Whenever you have control over the time of day in which you'll be shooting a location portrait, always remember that the hour that wraps around sunset will offer you at least five different lighting environments in which to work. 

And for today's portrait of birders Jo (left) and Bob Solem, we're going to use three of them. 

1. As it happened: Donald Trump ally taunts Kevin Rudd; WiseTech shareholders launch class action  Sydney Morning Herald
2. Ditching Rudd over Trump insults would be ‘worst possible signal’: Turnbull  Sydney Morning Herald
3. Senior Liberal calls for Rudd to be sacked after Trump advisor suggests US ambassador is on thin ice  9News

[BULLETIN: Quicklisp now has the latest version of FSet.]

Sycamore, primarily by Neil Dantam, is a functional collections library that is built around the same weight-balanced binary tree data structure (with leaf vectors) that FSet uses.  While the README on that page comments briefly on the differences between Sycamore and FSet, I don't feel that it does FSet justice.  Here is my analysis.

Dantam claims that his library is 30% to 50% faster than FSet on common operations.  While I haven't done comprehensive micro-benchmarking, a couple of quick tests indicates that this claim is plausible.  A look through the internals of the implementation confirms that it is clean and tight, and I must commend him.  There may be some techniques in here that I could usefully borrow.

Most of the performance difference is necessitated by two design choices that were made differently in the two libraries.  One of these Dantam mentions in his comparison: FSet's use of a single, global ordering relation implemented as a CLOS generic function, vs. Sycamore's more standard choice of requiring a comparison function to be supplied when a collection is created.  The other one he doesn't mention: the fact that FSet supports a notion of equivalent-but-unequal values, which are values that are incomparable — there's no way, or at least no obvious way, to say which is less than the other, and yet we want to treat them as unequal.  The simplest example is the integer 1 and the single-float 1.0, which have equal numerical values (and cl:= returns true on them), but which are nonetheless not eql.  (I have a previous blog post that goes into a lot more detail about equality and comparison.)  Since Sycamore expects the user-supplied comparison function to return an integer that is negative, zero, or positive to indicate the ordering of its arguments, there's no encoding for the equivalent-but-unequal case, nor is there any of the code that would be required to handle that case.

Both of these decisions were driven by my goal for the FSet project.  I didn't just want to provide a functional collections library that could be called occasionally when one had a specific need for such a data structure.  My ambition was much grander: to make functional collections into a reasonable default choice for the vast majority of programming situations.  I wanted FSet users (including, of course, myself) to be able to use functional collections freely, with very little extra effort or thought.  While Lisp by itself reaches a little bit in this direction — lists can certainly be used functionally — lists used as functional collections run into severe time complexity problems as those collections get large.  I wanted the FSet collections to be as convenient and well-supported as lists, but without the time complexity issues.

— Or rather, I wanted them to be even more convenient than lists.  Before writing FSet, I had spent years working in a little-known proprietary language called Refine, which happened to be implemented on top of Common Lisp, so it was not unusual to switch between the two languages.  And I had noticed something.  In contrast to CL, with its several different predefined equality predicates and with its functions that take :test arguments to specify which one to use, Refine has a single notiion of equality.  The value space is cleanly divided between immutable types, which are compared by value — along with numbers, these include strings, sets, maps, and seqs — and mutable objects, which are always compared by identity.  And it worked!  I found I did not miss the ability to specify an equality predicate when performing an operation such as "union".  It was just never needed.  Get equality right at the language level, and the problem goes away.

Although FSet's compare generic function isn't just for equality — it also defines an ordering that is used by the binary trees — I thought it would probably turn out to be the case that a single global ordering, implemented as a generic function and therefore extensible, would be fine the vast majority of the time.  I think experience has borne this out.  And just as you can mix types in Lisp lists — say, numbers and symbols — without further thought, so you can have any combination of types in an FSet set, effortlessly.  (A project I'm currently working on actually takes considerable advantage of this capability.)

As for supporting equivalent-but-unequal values, this desideratum flows directly from the principle of least astonishment.  While it might not be too surprising for a set or map implementation to fail distinguish the integer 1 from the float 1.0, it certainly would be very surprising, and almost certainly a source of bugs in a compiler that used it, for it to fail to distinguish two uninterned symbols with the same name.  (I saw a macro expansion recently that contained two distinct symbols that both printed as #:NEW.  It happens.)  A compiler using Sycamore for a map on symbols would have to supply a comparison function that accounted for this; it couldn't just compare the package name and symbol name.  (You'd have to do something like keep a weak hash table mapping symbols to integers, assigned in the order in which the comparison function encountered them.  It's doable, but FSet protects you from this madness.)

Along with those deep semantic design choices, I've spent a lot of time on developing a wide and featureful API for FSet (an effort that's ongoing).  FSet has many features that Sycamore lacks, including:

• seqs, a binary-tree sequence implementation that holds arbitrary Lisp objects (Sycamore ropes hold only characters, which is certainly an important special case, but why restrict ourselves?)
• default values for maps and seqs (the value to return when the key is outside the domain is associated with the collection, not supplied at the call site; this turns out to be a significant convenience)
• generic functions that operate on both lists and FSet collections, to shadow the CL builtins
  
• the powerful map-union and map-intersection operations (I'll blog about these in the future)
• more ways to iterate over the collections (the FSet tutorial has a good summary, about 3/4 of the way down)
• speaking of the tutorial, FSet has lots more documentation

Let me digress slightly to give an example of how FSet makes programming more elegant and convenient.  Joe Marshall just put up a blog post comparing Go(lang) with Common Lisp, which is worth a read on its own; I'm just going to grab a code snippet from there to show a little bit of what programming with FSet is like.  Here's Joe's code:

 (defun collate (items &key (key #'identity) (test #'eql) (merger (merge-adjoin #'eql)) (default nil))
   (let ((table (make-hash-table :test test)))
     (dolist (item items table)
       (let ((k (funcall key item)))
         (setf (gethash k table) (funcall merger (gethash k table default) item))))))

 (defun merge-adjoin (test)
   (lambda (collection item)
     (adjoin item collection :test test)))

And here's what I would write using FSet:

(Well, I would probably move result outside the dolist form to make it clearer what the return value is, but let's go with Joe's stylistic choice here.)

For those who haven't used FSet: the form (map :default (set)) creates a map whose default is the empty set, meaning that lookups on that map will return the empty set if the key is not in the map.  This saves the includef form from having to handle that possibility.

My version makes assumptions, it's true, about how you want to collect the items with a given key; it doesn't give you other choices.  It could, but what would be the point?  It's already using a general set with better time complexity than lists, and saving you from having to write anything like merge-adjoin.  The extensible global equivalence relation means you're not going to need to supply a :test either.

I think the FSet-enhanced code is cleaner, more elegant, and therefore clearer than the plain-CL version.  Don't you agree?  Maybe you wouldn't say it's a huge improvement, okay, but it's a small example; in a larger codebase, I would argue, these small improvements add up.

* * * * *

To summarize: if you just want a library you can call in a few places for specific purposes, Sycamore might work better for you (but think hard if you're writing a comparator for symbols).  FSet can certainly be used that way, but it can be much more.  If you want to see one way in which Common Lisp can be made into a better language, without giving up anything that we love about it, I urge you to give FSet a try.

FSet has changed the way I write Lisp programs.  — an FSet user

(UPDATE: the magnitude of the performance difference between FSet and Sycamore surprised me, and inspired me to do some profiling of FSet.  It turned out that I could get a 20% speedup on one micro-benchmark simply by adding some inline declarations.  Mea culpa, mea culpa, mea maxima culpa; I should have done this years ago.   With that change, the generic function overhead appears to be the only significant cause of the remaining ~20% performance difference.  I tried creating a Sycamore set using a thin wrapper around fset:compare, and the resulting performance was very similar to that of FSet with its new inlines.)

How inclusive is NSA in terms of diversity? Recently, two employees answered that question and more. Let’s go straight to the source. Michelle E. Prior to joining the National Security Agency (NSA) as a recruiter, Michelle E., pictured life at the agency like many of us do. “Whenever thinking about NSA, I always thought of […]

The post Diversity in the NSA Workplace: ‘Your Unique Voice and Skillset will be an Asset’ appeared first on DiversityJobs.com.

I do a detailed analysis of Cantor’s theory of uncountable sets. The logic of his proofs has some weaknesses. I propose an axiom and a solution to continuum hypothesis. The main idea is: Assumption of Cantor’s proofs: All real numbers (set R) are in a list (list L). This assumption means R=L, considering L as...

An analysis of Cantor’s theory of uncountable sets: The logic of his proofs has some weaknesses. Cantor assumes for both his proofs that all real numbers (set R) are in a list (list L). Considering L as a set this assumption assumes R belongs to L. This makes the claim “a real number is constructed...

Last week, I briefly mentioned the shaded metallic thread sets from Au Ver a Soie that I’m so happy to …

A few years back, I found myself in a rut with goal-setting. I had all these grand ambitions, but making actual progress always felt like an uphill battle. I’d set huge goals like “become a famous entrepreneur” or “get shredded,” but within months, my motivation would fizzle and I’d be back where I started. Even ... Read more

The post Reimagining Goal Setting: The Power of Northstar Goals appeared first on LifeHack.

Have you ever felt like you’re drifting through life, unsure of where you’re headed or what you’re working towards? If so, you’re not alone. Many of us find ourselves caught up in the day-to-day hustle, losing sight of our bigger aspirations and dreams. But what if there was a way to change that? What if ... Read more

The post Setting Life Goals: The Path to Fulfillment and Success appeared first on LifeHack.

Ah, 2024. Another year, another set of resolutions gathering dust by February, right? Not this time. Let’s face it – we’ve all been there, setting lofty goals only to watch them fizzle out faster than a New Year’s Eve sparkler. But here’s the kicker: it’s not about cramming more into your day like it’s a ... Read more

The post How to Set and Crush Your Goals in 2024: Expert Tips and Examples appeared first on LifeHack.

The post How to Set up an Online Bookstore appeared first on DARCY PATTISON.

As an indie publisher, I rely on the POD (Print on Demand) printers. Many indies make most of their money from ebook sales. But for children’s books, the market has consistently been print-driven with only 10-25% of income from ebooks. That can vary widely, as some authors do very well on the Kindle Unlimited platform.

The post How to Set up an Online Bookstore appeared first on DARCY PATTISON.

Hasbro has produced a 4-figure set for a 21-year old Timothy Zahn Star Wars books and it DOESN'T feature Thrawn?

A few years ago, I had a successful KonMari sesh that helped me tackle my closet chaos. But over time, I noticed that clutter started to creep back in. The issue was: All In, No Out. I made new purchases—thanks to an expanding waistline—but neglected to let go of ill-fitting clothes (because maybe, just maybe, I may fit into them again?) But recently, after spending a good 10 minutes digging through my wardrobe for that particular mustard cardigan, it became […]

The post 10 Things From IKEA Helped Me Tame Closet Chaos (Finally!) appeared first on IKEA Hackers.

The post “Tower of Bable” Set to Fire in Nikola-Lenivets appeared first on English Russia.

The post Horizontal Swing Set appeared first on English Russia.

The conference has been scheduled for Oct. 9-11, 2025. All Princeton alumni are invited back to campus for the gathering. 

Making Dorset buttons is addictive!!! With endless possibilities for both design and use, these sweet creations keep my mind spinning, my hands busy, and my heart pulsating!

Made with a few simple materials - thread or yarn, a metal or plastic ring, and a needle - Dorset buttons can be plain, like this one on a replica of a Victorian chemise.

“Chigumadzi argues that within the liberal international order, it is “reasonable” and “workable” to struggle to end apartheid and racial segregation, while it is “unreasonable” and “unworkable” to struggle to end settler colonialism and indigenous land dispossession. In arguing that apartheid is overrepresented in the International Left’s racial discourse and historiography, Chigumadzi draws from generations of Black South African political activists, philosophers, and historians—most notably from the Pan Africanist-Black Consciousness Tradition. These traditions critique apartheid’s relatively short 54 years of institutionalized racial segregation as the paradigmatic historical framework for analyzing South Africa’s three centuries of settler colonialism and land dispossession. Drawing from this black radical critique, Chigumadzi rejects the liberal notion that apartheid’s end is the object of liberation struggle, and, instead asserts the centrality of the struggle for the return of indigenous lands.” Dr. Panashe Chigumadzi is an award-winning writer and Assistant Professor of African History at Brandeis University. Chigumadzi holds a doctorate from Harvard University’s Department of African and African American Studies, and a masters in African Literature from the University of the Witwatersrand, Johannesburg, South Africa.

The project is from Mattel Films, Shadowmachine, Jennifer Lopez’s Nuyorican Productions, and actor-producer Anthony Ramos.

We have already shared our thoughts on why people do blog and why blogging is still afloat despite the rise of social media. We have also reasoned the help of automated blogging and even its necessity. And after RSS Ground has updated all of its automated posters we would like to dwell in more detail […]

The post Smart Way To Set Up Automated Blog Posting appeared first on RSSground.com.

We continue our updates and improvements based on your recent suggestions. This time, we have enhanced some interface options as well as Personal Feeds functionality. Please enjoy! Pagination has been added to the bottom of all RSS Ground lists (tables). We have also added an “attention seeker” bouncing effect for the Filters icon. It will […]

The post Another set of updates for personal feeds and more appeared first on RSSground.com.

What causes those beautiful reds, oranges, and pinks at sunset?

Cameras started rolling for The White Lotus cast on the Thai islands in February

Located on the Caribbean coast, Cozumel has some of the most stunning beaches in the world. It’s not just the turquoise waters and soft sandy beaches that attract tourists from all over the world. The island is also known for its spectacular sunsets, painting the sky in vibrant colors of orange, pink and red, and promising a magical end to every day. Looking for the perfect sunset spot Seeing the sunset, however, is only half the experience. It can escalate from a simple natural phenomenon to an unforgettable memory where you choose to see it. Enter the quintessential beach bar. These getaways dot Cozumel’s beaches, each offering a different climate and different temperatures. It is important to choose the right one. With the perfect cocktail in hand, it can mean the difference between a beautiful sunset and an extraordinary sunset. Choosing where to stumble in the evening light isn’t just about finding the best spot. It’s about the atmosphere, the drinks, the service, and how the sound of the waves matches the music in the background. It is a form of art. And we’re here to guide you through it. Unveiling the Top 10 Beach Bars in Cozumel for Stunning Sunsets Cozumel, a gem in the Caribbean, is famed not just for its crystal-clear waters and vibrant marine life but also for its spectacular sunsets that paint the sky in shades of orange, pink, and purple. Among the best ways to enjoy these magical moments is from the comfort of the island’s best beach bars. Here’s a countdown to the top 10 beach bars in Cozumel for those unforgettable sunset views. 10. The Sunset Lounge Description: Nestled on the quieter side of the island, The Sunset Lounge offers a laid-back vibe with hammocks and cozy seating. Their signature cocktail, the “Caribbean Sunset”, combines local fruits with aged rum. Ambiance: Chill and intimate Unique Feature: A private pier for sunset gazers Best Time for Sunsets: Arrive an hour before sunset for the perfect spot. Interesting Fact: The Sunset Lounge was once a private retreat before opening its doors to the public. 9. Ocean Vibes Bar Description: A vibrant spot where live music and ocean views create a lively atmosphere. Their “Blue Horizon” cocktail is a must-try. Ambiance: Festive and musical Unique Feature: Live bands every evening Best Time for Sunsets: The party starts in the late afternoon, leading up to sunset. Interesting Fact: Ocean Vibes Bar holds a record for hosting the longest-running beach party on the island. 8. Coral Reef Inn Description: More of a cozy inn with a spectacular beach bar, it’s known for its extensive tequila selection and the “Mayan Mule” cocktail. Ambiance: Rustic and cozy Unique Feature: An underwater-themed bar top Best Time for Sunsets: Just as the dusk settles in. Interesting Fact: Its signature bar top features real corals and artifacts found in Cozumel’s waters. 7. Sunset Paradise Description: This bar offers panoramic views of the ocean, making it a prime spot for sunset watching. Their specialty is the “Paradise Punch”. Ambiance: Romantic and serene Unique Feature: Elevated decks for an unobstructed view Best Time for Sunsets: Half an hour before sunset is ideal. Interesting Fact: The bar’s location was chosen specifically for its unobstructed sunset views. 6. Azure Sky Bar Description: Famous for its signature “Azure Martini” and a sophisticated atmosphere. It’s a favorite among luxury travelers. Ambiance: Elegant and upscale Unique Feature: An infinity pool that blends with the ocean horizon Best Time for Sunsets: Right as the sun begins to dip below the horizon. Interesting Fact: The bar was designed by a renowned architect who wanted to capture the essence of the ocean in every element. 5. La Cazuela del Mar Description: Known for its seafood cuisine, this bar’s “Seaside Sangria” is a refreshing accompaniment to the stunning views. Ambiance: Casual and friendly Unique Feature: A menu that changes daily based on the catch of the day Best Time for Sunsets: Early evening to enjoy dinner with the show. Interesting Fact: The owner is a former fisherman who shares tales of the sea with guests. 4. The Horizon Club Description: Overlooking the highest point on the island, this bar offers not just cocktails, like their “Horizon Spritz”, but also a breathtaking view of the entire bay. Ambiance: Exclusive and private Unique Feature: A telescope for star-gazing post-sunset Best Time for Sunsets: An hour before sunset to appreciate the changing colors. Interesting Fact: It stood as a historical lookout post in the 18th century. 3. Pirate’s Hideaway Description: With a fun pirate theme, this bar serves a “Treasure Chest” cocktail filled with rum and tropical fruits. Ambiance: Fun and thematic Unique Feature: Authentic pirate memorabilia Best Time for Sunsets: As the sun starts its descent, to capture the golden hour. Interesting Fact: The bar is rumored to be built on an actual pirate hideout. 2. Moonlit Mirage Description: Offering serenity alongside inventive cocktails like the “Moonlit Mojito”, this bar is perfect for a tranquil sunset. Ambiance: Quiet and reflective Unique Feature: Moonlight reflection pools Best Time for Sunsets: Moments before the sun meets the horizon. Interesting Fact: The reflection pools are a nod to the ancient Mayan practices of moon gazing. 1. The Majestic View Description: Crowned as the best beach bar for sunsets in Cozumel, The Majestic View marvels with its “Cosmic Colada”, an interplay of local spices and coconut rum. Ambiance: Breathtaking and unforgettable Unique Feature: A cliff-top location that offers a 360-degree view of the surrounding landscape and ocean. Best Time for Sunsets: Be there an hour early to catch the gradual change in scenery. Interesting Fact: It’s said that on certain evenings, the conditions create a green flash phenomenon just as the sun sets. Each of these beach bars in Cozumel offers a unique experience for sunset seekers. From the vibrant and lively to the serene and intimate, there’s a spot for every kind of traveler looking to capture the essence of Cozumel’s sunsets. Whether you’re there for the cocktails, the company, or just the views, these bars are sure to make your evenings in Cozumel unforgettable. Additional Tips for the Perfect Sunset Experience Best Sunset Watching Practices To guarantee you don’t miss out on the splendid Cozumel sunset: Ideal Arrival Time: Aim to arrive at least an hour before the expected sunset time. This allows you to secure the best viewing spot. Photography Tips: Use a low ISO setting to avoid grainy photos. Set your camera to a small aperture (high f-number) for a deeper depth of field. Utilize the golden hour filter on photo apps for an enhanced effect. Local Etiquette and Tips Being mindful of local customs and practices enhances the experience: Local Customs: Always ask for permission before taking photos of the locals or private properties. Happy Hour Info: Many beach bars offer ‘happy hour’ specials 1-2 hours before sunset, making it a great time to enjoy discounted drinks as you wait for the sunset. Map and Directions While a detailed map cannot be displayed here, all mentioned beach bars are located along Cozumel’s western coast, facing the Caribbean Sea, ideal for sunset views. You can easily find them marked on any local map provided by the tourist offices in Cozumel. Transport Options: Taxi: Readily available and reasonably priced. Ensure to agree on the fare before the ride. Rentals: Scooters and cars are available for rent if you prefer exploring at your own pace. Public Transport: Buses and colectivos (shared vans) run frequently along the main road, offering an economical way to travel. conclusion Cozumel’s beach bars not only offer delicious drinks and a lively atmosphere, but also some of the most spectacular sunsets in the Caribbean. Remember to arrive early, be mindful of local customs, and don’t forget your camera to capture amazing scenes. Whether you want a romantic evening, a quiet solo getaway, or a fun night out with friends, these bars offer the perfect setting. We encourage all visitors to explore these areas and discover the natural beauty and unique local hospitality that Cozumel offers. And once you soak in the unique sunset, be sure to share your experience or personal tips to help your fellow travelers make the most of their Cozumel trip.

The post 10 Best Beach Bars in Cozumel for Unforgettable Sunsets appeared first on Geeky Traveller.

The TV presenter says the previous Tory administration was "reckless" to scale back climate policy.

Trump's election will hit immediate efforts to tackle climate change, experts say - but the longer-term effect is less certain.

It is also set to be the world's first breach of 1.5C of warming across an entire calendar year.

F1 in 10 Years is a new BBC Sport series that talks to the decision-makers in Formula One about the future they would like to see.

Each week, we ask you to send in your pictures on a set theme and a selection of these are then published each Thursday on our In pictures page

If you have an old PowerPC Mac laying around collecting dust in a closet somewhere, you might be able to get some use out of it today by installing a functional modern web browser, like Aquafox. Since so much of what many of us do on computers is done in a web browser, you might ... Read More

Communications and Digital Technology Minister Solly Malatsi will issue a policy direction on equity alternatives to the 30% equity employment rule in the communications industry.

IVT released its latest upgrades to its MediaPlatform software.

Click to view the announcement.

Earlier this year, we announced that Basecamp was committing to getting to carbon negative for our cumulative history and moving forward. Today, I want to share an update on that commitment. Note: I edited this post on Nov 5, 2020 to include the prices paid for all carbon offsets and explain a little more about the… keep reading

May 10, 2022 (New York, NY) – Elon Musk has his work cut out for him as he takes the reigns at Twitter. Worldwide user growth will be essentially flat […]

Offsetting the North Korean strategic challenge 16 March 2023 — 9:30AM TO 10:30AM Anonymous (not verified) 8 March 2023 Online

This event explores what balance between pressure and dialogue is most likely to incentivise North Korea to limit its provocations.

With North Korea having steadily increased its nuclear and conventional security capabilities over the course of recent months, the speakers explore practical options for lowering tensions on the Korean peninsula.

They consider how best to re-engage diplomatically with North Korea, including the role of key actors such as the US, South Korea, Japan, and European states, in advancing a constructive resolution of current tensions.

The discussion explores finding a balance between pressure and dialogue which is most likely to incentivise North Korea to limit its provocations, assess the risks of a possible seventh nuclear test, and consider the viability of multilateral cooperation in enhancing regional security in north-east Asia.

This event forms part of the Korea Foundation Korea Fellowship, funded by the Korea Foundation and Taejae Academy.

Alfred C. O. Vertegaal
Dec 1, 2006; 5:2298-2310
Research

Resetting Africa-Europe relations: From self-deception to economic transformation 28 October 2024 — 12:30PM TO 1:30PM Anonymous (not verified) 16 October 2024 Chatham House and Online

Experts assess the status of ties between Africa and Europe in a rapidly changing world, launching a new book that explores how misconceptions in the relationship can harm Africa’s economic agenda.

The relationship between Africa and Europe has long been shaped by colonial legacies, power imbalance and shifting geopolitical interests.

Almost three years on from the last EU-AU summit in Brussels in February 2022, questions remain over the delivery of headline commitments under the continent-to-continent partnership – ranging from the EU’s Global Gateway infrastructure strategy to wider climate financing promises.

As Africa seeks to strengthen its standing on the global stage, marked by the African Union’s upcoming debut at the G20 summit in November, a critical reassessment of these dynamics is needed to examine whether the continent’s relationship with Europe can overcome stigmatized narratives in search of genuine economic benefit.

At this event, which launches a new book by Professor Carlos Lopes: The Self-Deception Trap: Exploring the Economic Dimensions of Charity Dependency within Africa-Europe Relations, speakers assess the prospects for a transformative shift towards a more equitable and mutually beneficial Africa-Europe partnership.

Michael Dean
Jul 1, 2001; 42:1007-1017
Thematic Reviews

The Future of Investment Dispute Settlement Regimes 30 June 2020 — 2:00PM TO 3:30PM Anonymous (not verified) 9 February 2021 Online

This event is part of the Inclusive Governance Initiative, which is examining how to build more inclusive models and mechanisms of global governance fit for purpose in today’s world.

Is an ‘atomized’ approach to cross-border investment dispute resolution inevitable? Has the multiplicity of mechanisms helped or hindered inclusivity in and transparency in governance? Is there a need for, and scope to, increase the international coordination of dispute resolution mechanisms? If so, what form should it take? What could be the implications for international economic law?

Expert

Ran Gu and Bing Gao
Math. Comp. 93 (), 2837-2860.
Abstract, references and article information