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The previous post defined the polar triangle of a spherical triangle in terms of its sides and angles, but it doesn’t construct the triangle. It only specifies one of a family of triangles located anywhere on the sphere. How do we know that polar triangles exist? There is a geometric construction that starts with a […]

The post Computing polar triangles with linear algebra first appeared on John D. Cook.

I’ve written before about the law of cosines on a sphere: cos(c) = cos(a) cos(b) + sin(a) sin(b) cos(C). But that’s just one of two laws of cosines on a sphere. The equation above is the law of cosines for sides. The law of cosines for angles is typographically very similar, just inverting the case of […]

The post Duality in spherical trigonometry first appeared on John D. Cook.

By now regular readers of this blog are quite familiar with my affection for the 1996 Apple Network Server, Apple's Unix-through-and-through $10,000+ server that only shipped with, and only officially ran, Harpoon, its unique superset of IBM AIX. An ANS 500, the lower tier...

Things aren’t looking great.

Is that a *hole* in your reasoning?

Here are the Vim forks I know about:

• Neovim: “a Vim-based text editor engineered for extensibility and usability, to encourage new applications and contributions.”

• Vim Classic: “a stable, long-term support fork of the ubiquitous text editor, maintained without the assistance of generative AI tools.”

• EVi: “a hard-fork of Vim v9.1.0 (Jan 2024) before AI was used in the project.”

• MacVim: “a macOS version of the Vim text editor, providing a graphical user interface for Vim, while tightly integrating with macOS and providing features specific to the platform.”

This list doesn’t include Vim-inspired editors like Kakoune, Vim-style plugins for other editors like IdeaVim, or Vim “distributions” like LazyVim.

Contact me if you know of other forks!

Release: battledrones v14: Compass Rose, a four player map I added four player online mode to Battledrones - previous maps were limited to two. Here's the initial prompt I used: Add a new map for a four player battle - four way rotational symmetry, up to four AI pl...

Memory caps, run time limits, sleep inhibitors, better cron and path units - systemd features that turn out to be handy for running throwaway agent-written code.

I’ve been in London for the last month and have heard policymakers react to the wake up call Elon Musk just delivered.  The decision of the U.S. to shut off intelligence and throttle the military version of Starlink called Starshield to Ukraine may have been a blip in the news in the US, but it […]

Minimum lot sizes, Boeing’s next 737 MAX, Fervo short sellers, Figure AI’s training data, and more.

Releases, advisories, and articles from across the package management world

This article tells part of the story of John Romero. Note that there is a sexually suggestive image below that may be Not Safe For Work! In the badlands of what used to be Texas, rumor has it that John Romero has thrown himself out the window of Ion Storm’s penthouse offices. Apparently Romero had […]

After reading Evie King's previous book Ashes To Admin - Tales from the Caseload of a Council Funeral Officer I was eager to read her not-quite-a-sequel. We know what happens after death; paperwork. Gas bills need to be cancelled, funeral wishes need to be carried out, money needs to be apportioned between warring family members. When you die, you won't be there to experience the annoyance and …

In 1982, computers seemed like a thing in the future for the majority of people. But Commodore was doing what they could to make them affordable. After creating the first color computer that would sell for less than $300, the

The post Commodore 1600 VICmodem appeared first on The Silicon Underground.

Tool: Quick Study

Prompt to Claude Opus 5.5 High:

Build an artifact where you open a photo and it rapidly (in a few seconds) paints a version of that photo using a canvas element and simulated paintbrush

See also my previous experiment getting Claude Fable to simulate a watercolor illustration with P5.js.

Quick Study uses Sobel edge detection, with no external libraries beyond Google Fonts.

Tags: tools

Today's links Critique and writing: The most important part of a writing workshop is trying to fix other people's stories. Hey look at this: Delights to delectate. Object permanence: USPS nukes the mail; Enron Explorer; "Scored"; UAE's international hacker legion; NZ provides...

It cleans up at the wrong time.

The post Why didn’t we use the COM static store to clean up the unmarshalable delegate? appeared first on The Old New Thing.

Looking more closely at the function's behavior and requirements.

The post Why didn’t we use <CODE>Co­Register­Initialize­Spy</CODE> to clean up the unmarshalable delegate? appeared first on The Old New Thing.

Introducing Kimi K3.1 Pro Kimi K3.1 Pro landed on the Kimi API today - it's not yet open weights, but Moonshot promise "Full model weights will be released by Nov 4, 2026". They're also offering a "Highspeed" version that's 2-3x faster, at twice the price (except for input ...

A forlorn businessman resting his head against a wall beside a window. Photo by Andrea Piacquadio, via Pexels. In the hours following the release of CVE-2026-89078 for the project Ruby, site reliability workers and systems administrators scrambled to desperat...