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Bumble BFF’s revamped app is here, focusing on friend groups and community building

techcrunch.com Lauren Forristal 2025-09-21 05:19:41

With friendship apps continuing to gain popularity, Bumble announced on Wednesday the relaunch of its Bumble For Friends (BFF) app. With younger generations seeking to expand their social circles, the revamped app aims to help users connect with new friends beyond the traditional one-on-one matching that BFF has been known for. The app is built on Geneva, the community-focused social platform Bumble acquired last year. This also means that the Geneva app will be shutting down. The move should

Topics: app bff bumble focus friends

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The Little Book of Linear Algebra

news.ycombinator.com Unknown 2025-10-18 00:17:07

The Little Book of Linear Algebra A concise, beginner-friendly introduction to the core ideas of linear algebra. Formats Chapter 1. Vectors 1.1 Scalars and Vectors A scalar is a single numerical quantity, most often taken from the real numbers, denoted by $\mathbb{R}$ . Scalars are the fundamental building blocks of arithmetic: they can be added, subtracted, multiplied, and, except in the case of zero, divided. In linear algebra, scalars play the role of coefficients, scaling factors, and e

Topics: begin bmatrix mathbb mathbf matrix

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Zooming in on weird cameras

theverge.com Allison Johnson 2025-10-29 12:00:00

is a senior reviewer with over a decade of experience writing about consumer tech. She has a special interest in mobile photography and telecom. Previously, she worked at DPReview. Posts from this author will be added to your daily email digest and your homepage feed. Unconventional cameras are having a bit of a moment. From the Sigma BF to the Fujifilm Half to young photographers reaching for old digital point-and-shoots, the camera industry has looked a little different over the past few yea

Topics: allison bf bigger camera decade

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Scientists Have Identified the Origin of an Extraordinarily Powerful Outer-Space Radio Wave

wired.com Jorge Garay 2025-10-29 14:49:17

The Earth is constantly receiving space signals that contain vital information about extremely energetic phenomena. Among the most peculiar are brief pulses of extremely high-energy radio waves, known as fast radio bursts (FRB). Astronomers compare them to a powerful lighthouse that shines for milliseconds in the middle of a rough, distant sea. Detecting one of these signals is an achievement in itself, but identifying its origin and understanding the nature of its source remains one of the grea

Topics: chime frbs rbfloat signals team

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A short introduction to optimal transport and Wasserstein distance (2020)

news.ycombinator.com Unknown 2025-10-29 12:15:03

A Short Introduction to Optimal Transport and Wasserstein Distance These notes provide a brief introduction to optimal transport theory, prioritizing intuition over mathematical rigor. A more rigorous presentation would require some additional background in measure theory. Other good introductory resources for optimal transport theory include: Why Optimal Transport Theory? A fundamental problem in statistics and machine learning is to come up with useful measures of “distance” between pairs o

Topics: mathbf optimal plan problem transport

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Scientists Have Identified the Origin of an Extraordinarily Powerful Outer Space Radio Wave

wired.com Jorge Garay 2025-11-01 02:49:17

The Earth is constantly receiving space signals that contain vital information about extremely energetic phenomena. Among the most peculiar are brief pulses of extremely high-energy radio waves, known as fast radio bursts (FRB). Astronomers compare them to a powerful lighthouse that shines for milliseconds in the middle of a rough, distant sea. Detecting one of these signals is an achievement in itself, but identifying its origin and understanding the nature of its source remains one of the grea

Topics: chime frbs rbfloat signals team

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Show HN: I built a toy TPU that can do inference and training on the XOR problem

news.ycombinator.com Unknown 2025-11-12 17:52:14

Nobody really understands how TPUs work…and neither do we! So we wanted to make this because we wanted to take a shot and try to guess how it works–from the perspective of complete novices! We wanted to do something very challenging to prove to ourselves that we can do anything we put our mind to. The reasoning for why we chose to build a TPU specifically is fairly simple: None of us have real professional experience in hardware design, which, in a way, made the TPU even more appealing since w

Topics: bmatrix frac mathbf partial phantom

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I fell in love with a $2,000 mirrorless camera that puts design and simplicity over everything else

zdnet.com Tiernan Ray 2025-11-24 17:29:00

Sigma BF ZDNET's key takeaways Sigma's BF is a $2,200, 35mm full-frame, mirrorless digital camera that radically changes the mode of operation by replacing the gaggle of buttons with an elegant click-wheel. It's a great first camera but also has tons of pro features A future upgrade to a higher-resolution 60-megapixel sensor would be a welcome enhancement. View now at Adorama View now at B&H more buying choices Taking pictures with a digital camera hasn't changed much in thirty years. The ele

Topics: bf camera sigma tiernan zdnet

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Why I recommend this $2,000 mirrorless camera to both beginners and professionals

zdnet.com Tiernan Ray 2025-12-08 03:20:00

Sigma BF ZDNET's key takeaways Sigma's BF is a $2,200, 35mm full-frame, mirrorless digital camera that radically changes the mode of operation by replacing the gaggle of buttons with an elegant click-wheel. It's a great first camera but also has tons of pro features A future upgrade to a higher-resolution 60-megapixel sensor would be a welcome enhancement. View now at Adorama View now at B&H more buying choices Taking pictures with a digital camera hasn't changed much in thirty years. The ele

Topics: bf camera sigma tiernan zdnet

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New Plague Linux malware stealthily maintains SSH access

bleepingcomputer.com Unknown 2025-12-10 22:42:06

A newly discovered Linux malware, which has evaded detection for over a year, allows attackers to gain persistent SSH access and bypass authentication on compromised systems. Nextron Systems security researchers, who identified the malware and dubbed it "Plague," describe it as a malicious Pluggable Authentication Module (PAM) that uses layered obfuscation techniques and environment tampering to avoid detection by traditional security tools. This malware features anti-debugging capabilities to

Topics: authentication environment linux malware obfuscation

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I tested the viral Sigma BF camera, and its radical redesign has me hooked

zdnet.com Tiernan Ray 2025-12-12 12:29:00

Sigma BF ZDNET's key takeaways Sigma's BF is a $2,200, 35mm full-frame, mirrorless digital camera that radically changes the mode of operation by replacing the gaggle of buttons with an elegant click-wheel. It's a great first camera but also has tons of pro features A future upgrade to a higher-resolution 60-megapixel sensor would be a welcome enhancement. View now at Adorama View now at B&H more buying choices Taking pictures with a digital camera hasn't changed much in thirty years. The ele

Topics: bf camera sigma tiernan zdnet

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Do variable names matter for AI code completion? (2025)

news.ycombinator.com Unknown 2025-12-17 09:35:25

Do Variable Names Matter for AI Code Completion? When GitHub Copilot suggests your next line of code, does it matter whether your variables are named current_temperature or just x ? I ran an experiment to find out, testing 8 different AI models on 500 Python code samples across 7 naming styles. The results suggest that descriptive variable names do help AI code completion. The Experiment Each code sample was transformed into different naming conventions: Descriptive ( process_user_input )

Topics: ai code descriptive names obfuscated

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Extending That XOR Trick to Billions of Rows

news.ycombinator.com Unknown 2026-01-06 08:15:41

Can we extend the XOR trick for finding one or two missing numbers in a list to finding thousands of missing IDs in a billion-row table? Yes, we can! This is possible using a data structure called an Invertible Bloom Filter (IBF) that compares two sets with space complexity based only on the size of the difference. Using a generalization of the XOR trick [1], all the values that are identical cancel out, so the size of this data structure depends only on the size of the difference. Most explan

Topics: difference ibf set trick xor

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Corrected UTF-8 (2022)

news.ycombinator.com Unknown 2026-01-31 02:29:26

UTF-8 is decent and all but it contains some design errors, partly because its original designers just messed up, and partly because of ISO and Unicode Consortium internal politics. We’re probably going to be using it forever so it would be good to correct these design errors before they get any more entrenched than they already have. Corrected UTF-8 is almost the same as UTF-8. We make only three changes: overlength encodings become impossible instead of just forbidden; the C1 controls and the

Topics: 80 bf byte sequence utf

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Functions Are Vectors (2023)

news.ycombinator.com Max Slater 2026-02-03 16:18:35

Functions are Vectors Conceptualizing functions as infinite-dimensional vectors lets us apply the tools of linear algebra to a vast landscape of new problems, from image and geometry processing to curve fitting, light transport, and machine learning. Prerequisites: introductory linear algebra, introductory calculus, introductory differential equations. This article received an honorable mention in 3Blue1Brown’s Summer of Math Exposition 3! Functions as Vectors Vectors are often first introd

Topics: align begin bmatrix end mathbf

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Pbf2sqlite: Reading OpenStreetMap into a SQLite Database

news.ycombinator.com Unknown 2026-02-14 03:17:41

pbf2sqlite A simple command line tool for reading OpenStreetMap .osm.pbf files into a SQLite database. Usage: pbf2sqlite DATABASE [OPTION ...] Options: read FILE Reads .osm or .osm.pbf FILE into the database rtree Add R*Tree indexes addr Add address tables graph Add graph table The command pbf2sqlite test.db read country.osm.pbf reads the OSM PBF file country.osm.pbf and creates in the database test.db the tables. OSM data can be obtained from a provider such as Geofabrik.

Topics: add database file osm pbf

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Latest Tech News

Bumble BFF’s revamped app is here, focusing on friend groups and community building

The Little Book of Linear Algebra

Zooming in on weird cameras

Scientists Have Identified the Origin of an Extraordinarily Powerful Outer-Space Radio Wave

A short introduction to optimal transport and Wasserstein distance (2020)

Scientists Have Identified the Origin of an Extraordinarily Powerful Outer Space Radio Wave

Show HN: I built a toy TPU that can do inference and training on the XOR problem

I fell in love with a $2,000 mirrorless camera that puts design and simplicity over everything else

Why I recommend this $2,000 mirrorless camera to both beginners and professionals

New Plague Linux malware stealthily maintains SSH access

I tested the viral Sigma BF camera, and its radical redesign has me hooked

Do variable names matter for AI code completion? (2025)

Extending That XOR Trick to Billions of Rows

Corrected UTF-8 (2022)

Functions Are Vectors (2023)

Pbf2sqlite: Reading OpenStreetMap into a SQLite Database

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