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Linear algebra for game developers – Part 1 (2009)
When I posted about decals last week, a number of readers commented that they would be interested in posts about linear algebra as it…
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The latest blog posts to take off on Hacker News. 460 posts.
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Backblaze Releases the Reed-Solomon Java Library for Free
Today we are releasing our latest open-source project: Backblaze Reed-Solomon Java library for erasure coding. Click for details on how to use and download.
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How Kalman Filters Work
This articles describes how Kalman filters and other state estimation techniques work, focusing on building intuition and pointing out good implementation techniques.
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Sorry ARIMA, but I’m Going Bayesian
When people think of “data science” they probably think of algorithms that scan large datasets to predict a customer’s next move or interpret unstructured te...
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Three and a half degrees of separation
At Meta, research permeates everything we do. We believe the most interesting research questions are derived from real world problems.
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How convolutional neural networks see the world
Note: this post was originally written in January 2016. It is now very outdated. Please see this example of how to visualize convnet filters for an up-to-date alternative, or check out chapter 9 of my book "Deep Learning with Python (2nd edition)".
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2^74207281-1 is Prime
GIMPS has discovered a new Mersenne prime number: 2^74207281-1 is prime! Discovered: 2016 Jan 07
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Is there any point to the 12 times table?
Jon McLoone on why we learn times tables, whether knowing them to 12 is better than to 10, approximation multiplication, & education recommendations
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Why it’s harder to forge a SHA-1 certificate than to find a SHA-1 collision
It’s well known that SHA-1 is no longer considered a secure cryptographic hash function. Researchers now believe that finding a hash collision (two values that result in the same value when SHA-1 is applied) is inevitable and likely to happen.
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There's Math.random(), and then there's Math.random()
V8’s Math.random implementation now uses an algorithm called xorshift128+, improving the randomness compared to the old MWC1616 implementation.
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Federal Reserve Bank of NY converts major economic model to Julia
Marco Del Negro, Marc Giannoni, Pearl Li, Erica Moszkowski, and Micah Smith We have implemented the FRBNY DSGE model in a free and open-source language called Julia. The code is posted here on GitHub, a public repository hosting service. This effort is the result of a collaboration between New York Fed staff and folks…
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The Discovery of Statistical Regression
We explore the hotly contested history of the crowning jewel of statistics.
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New general-purpose optimization algorithm promises order-of-magnitude speedups
MIT graduate students have developed a new “cutting-plane” algorithm, a general-purpose algorithm for solving optimization problems. They’ve also developed a new way to apply their algorithm to specific problems, yielding orders-of-magnitude efficiency gains.
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How is NSA breaking so much crypto?
There have been rumors for years that the NSA can decrypt a significant fraction of encrypted Internet traffic. In 2012, James Bamford published an article quoting anonymous former NSA officials stating that the agency had achieved a “computing breakthrough” that gave them “the ability to crack current public…
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A Beginner’s Guide to Recurrent Networks and LSTMs
The Eclipse Deeplearning4j Project. Eclipse Deeplearning4j has 5 repositories available. Follow their code on GitHub.
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Inferring Algorithmic Patterns with Stack
At Meta, research permeates everything we do. We believe the most interesting research questions are derived from real world problems.
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A Beginner’s Guide to Eigenvectors, Covariance, PCA and Entropy
The Eclipse Deeplearning4j Project. Eclipse Deeplearning4j has 5 repositories available. Follow their code on GitHub.
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Bayes’ Theorem – What is it and what is it good for?
Bayes’ Theorem tells us how to rationally assess the probability of a certain statement of interest being true, given some evidence. Insofar as science consists in creating hypotheses, collecting e…
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Computer scientists prove that a 40-year-old algorithm is optimal
Computer scientists from MIT find that a 40-year-old algorithm for determining the “edit distance” between symbols cannot be optimized any further.
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Rationality: From AI to Zombies
A series by Eliezer Yudkowsky
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After 100 Years, Ramanujan Gap Filled (2013)
History of mathematician Srinivasa Ramanujan’s lost notebooks and an exploration of solutions to those equations using Mathematica.
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Rationality: From AI to Zombies
Between 2006 and 2009, senior MIRI researcher Eliezer Yudkowsky wrote several hundred essays for the blogs Overcoming Bias and Less Wrong, collectively called