All elementary functions from a single binary operator

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
A single binary operator eml(x,y) can generate all standard functions of a scientific calculator using the constant 1. This operator enables exact recovery of closed-form functions from data at shallow tree depths.

Show HN: I built a social media management tool in 3 weeks with Claude and Codex

https://raw.githubusercontent.com/brightbeanxyz/brightbean-studio/main/.github/assets/brightbean-studio-logo.webp
BrightBean Studio is a free, open-source social media management platform for creators, agencies, and SMBs with no limits or paid tiers. It supports multiple platforms and features granular RBAC, rich editor, and direct API integrations.

The Economics of Software Teams: Why Most Engineering Orgs Are Flying Blind

https://www.viktorcessan.com/the-economics-of-software-teams/investment%20thesis.png
Software teams are expensive and their value is calculable, but most teams do not measure financial outcomes, instead tracking activity and sentiment metrics that can trend upward while financial performance deteriorates. To be financially viable, teams need to generate at least three to five times their annual cost in value, which requires a clear understanding of their costs, value ...

Taking on CUDA with ROCm: 'One Step After Another'

DIY Soft Drinks

https://blinry.org/diy-soft-drinks/3f3bb8383402a595.jpg
User makes sugar-free, caffeine-free cola using essential oils, gum arabic, and artificial sweeteners. They experiment with various flavors and ingredients, creating unique recipes like orange and almond soda.

Bring Back Idiomatic Design (2023)

https://substackcdn.com/image/fetch/$s_!rxaZ!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc7b070ba-f4cc-486e-a1c1-000ecb3c1a5d_517x316.png
The user misses the consistency in design of the desktop software era and believes that homogeneous interfaces are essential for user experience, citing the example of a checkbox being a standard design idiom. They argue that the lack of design idioms in modern web applications has led to frustration and a "guessing game" for users, and suggest that following established design patterns and ...

Show HN: boringBar – a taskbar-style dock replacement for macOS

https://boringbar.app/images/current-space-1.jpg
boringBar shows only active windows on the current display, allowing one-click switching and app launching. It requires a license after a 14-day trial, with personal and business options starting at $7.99/year and $20.99/year respectively.

Most people can't juggle one ball

https://res.cloudinary.com/lesswrong-2-0/image/upload/v1654295382/new_mississippi_river_fjdmww.jpg
A guide to juggling from zero to siteswap notation is provided, including tips on basic technique, common mistakes, and how to progress to more complex patterns. The guide covers various aspects of juggling, including 3-ball juggling, 4-ball juggling, and siteswap notation, as well as other implements like clubs and rings.

Optimization of 32-bit Unsigned Division by Constants on 64-bit Targets

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
Researchers proposed an optimization method for 32-bit unsigned division by constants targeting 64-bit CPUs. The method achieved speedups of 1.67x and 1.98x on Intel and Apple CPUs respectively.

Ask HN: What Are You Working On? (April 2026)

User is building Kavla, a canvas-based interface for data and agents, and working on CLI and AI projects like Orange Words and VCamper. They also created an IDE that automates testing and an interactive market visualization called Not Better Cursor.

A perfectable programming language

Sydney Von Arx challenged me to name 40 programming languages, which I did. I discussed the importance of types and theorem provers in programming languages, specifically Lean's capabilities.

I gave every train in New York an instrument

https://www.micwise.com/images/ogtrains.png
Trains form a jazz combo playing a unique, ever-changing piece based on location and time. The music is a portrait of the city, with each note reflecting the surroundings and the trains' routes.

Tell HN: Docker pull fails in Spain due to football Cloudflare block

You experienced TLS errors with a Cloudflare-hosted Docker image due to a blocked IP for a Spanish football match. This caused your GitLab pipelines to fail during the match.

We have a 99% email reputation, but Gmail disagrees

https://i0.wp.com/blogfontawesome.wpcomstaging.com/wp-content/uploads/2026/03/email-frustration.png?resize=1%2C1&ssl=1
We're a small software company that makes tools for designers and developers, but our emails often get marked as spam by Gmail due to their own reputation system. We're working to fix this by culling old addresses and slowing down our sends.

Caffeine, cocaine, and painkillers detected in sharks from The Bahamas

Please confirm you are a human by completing the captcha challenge below.

Is math big or small?

https://chessapig.github.io/assets/ihp/big_small/train/train_tracks.jpeg
The author discusses the importance of scale in mathematical illustrations, arguing that it can greatly affect the viewer's understanding and emotional response to the math. They explore various examples, including Bill Thurston's train tracks and Yasha Eliashberg's symplectic manifolds, to illustrate how different scales can be used to convey different aspects of mathematical ideas.

Show HN: Oberon System 3 runs natively on Raspberry Pi 3 (with ready SD card)

https://private-user-images.githubusercontent.com/2523113/576524540-ddbb8005-2c08-4a42-8fd9-d3a23c8f71c1.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.N7QmUMhftzZ_RnQXLoJ8ab7_QFjblkgZwihfDVCb7HE
The user successfully ported the Oberon system to Raspberry Pi 3b and other models, making it available for download. The system now boots and runs on QEMU and real hardware, with plans to debug and migrate the network driver.

Apple's accidental moat: How the "AI Loser" may end up winning

https://substackcdn.com/image/fetch/$s_!NqyU!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F669a66b1-85e1-47cd-93c9-7a7c6f58c248_1600x873.png
The author believes Apple's strategy of focusing on on-device AI and unified memory architecture may give them a competitive advantage in the AI market. Apple's approach allows for local inference, reducing the need for expensive infrastructure investments.

Exploiting the most prominent AI agent benchmarks

https://rdi.berkeley.edu/blog/trustworthy-benchmarks-cont/figures/terminal-bench-exploit.svg
An automated scanning agent discovered vulnerabilities in eight prominent AI benchmarks, allowing near-perfect scores without solving tasks. The Agent-Eval Checklist provides a minimum bar for robust evaluation, including isolating agents from evaluators and preventing tampering with evaluation data.

Seven countries now generate nearly all their electricity from renewables (2024)

https://assets-jpcust.jwpsrv.com/thumbnails/py4OrxLv-720.jpg
The Independent reports on various topics including climate change and reproductive rights without paywalls. Seven countries now generate nearly all their electricity from renewable energy sources.

How long-distance couples use digital games to facilitate intimacy (2025)

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
Researchers studied 13 LDR couples who play video games together, finding differences in play styles and ways couples express affection virtually. They created prototypes to address physical sensation and memorabilia storage issues in games.

JVM Options Explorer

The input specifies options for Java Heap allocation and class loading, including aliasing, prefetching, and locking. It also sets thresholds for using malloc or mmap for memory allocation.

I ran Gemma 4 as a local model in Codex CLI

https://miro.medium.com/v2/resize:fit:700/1*nF2MVZb3di2wlQBKYJ3m1A.png
The user tested Gemma 4 as a local model for agentic coding, comparing it to a cloud model. Local Gemma 4 works, but requires configuration and debugging.

Phyphox – Physical Experiments Using a Smartphone

https://phyphox.org/google-play-badge.png
The phyphox team received the Ars legendi-faculty award in 2020 for developing phyphox, an app for academic teaching and physics classes. They also received the teaching award in 2019 from the AG Physikalische Praktika of the German Physical Society.

A Canonical Generalization of OBDD

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
Tree Decision Diagrams (TDD) generalize OBDD and have the same tractability properties, but are more succinct. TDDs can represent CNF formulas of treewidth k in FPT size, unlike OBDD.

Google removes "Doki Doki Literature Club" from Google Play

https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:vnea37icaea6aufss6n4vpo4/bafkreigaipkm5tcheomjrjjiwgwew2cb5o5gougsblcdyez5kmp3wgjtrm
A statement regarding the removal of DDLC from the Google Play Store:

Pro Max 5x quota exhausted in 1.5 hours despite moderate usage

https://opengraph.githubassets.com/aed0bf6b42c4d0f2b60d6b920776adcd49fee29f13330e4c9e0e4ba12468266b/anthropics/claude-code/issues/45756
Cache_read tokens count at full rate against quota, negating prompt caching benefits. This causes quota exhaustion within 1.5 hours on Pro Max 5x plans.

A Tour of Oodi

https://blinry.org/oodi/4fccc6671b254665.jpg
Oodi is an innovative library in Helsinki with a giant screen, recording studios, and a makerspace. It offers various spaces for reading, working, gaming, and relaxation with a vast collection of books and modern amenities.

The peril of laziness lost

https://bcantrill.dtrace.org/2026/04/12/the-peril-of-laziness-lost/images/37k-a-day-bro.webp
Larry Wall's three programmer virtues are laziness, impatience, and hubris, with laziness being the most profound. LLMs lack this virtue, making systems larger and less efficient due to their lack of time constraints.

Haunt, the 70s text adventure game, is now playable on a website

https://haunt.madebywindmill.com/moose.jpg
CHEZ MOOSE TERMINAL MODEL IV