Math ∩ Programming
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/ Math ∩ Programming Main Content Primers All articles About rss About the Author I’m Jeremy Kun. I’m currently a staff software engineer at Google and I live in Portland, Oregon.
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More whimsical OEIS sequences
Here are some more whimsical OEIS sequences I came across. XKCD 2016 joked that "OEIS keeps rejecting my submissions," including one that gives "Integers in increasing order of width when printed in Helvetica." Well, two days after that comic was publishe
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CKKS - Polynomials, the Canonical Embedding, and Encoding
Table of Contents In this tutorial series, I will introduce the CKKS homomorphic encryption scheme from the ground up, in rather intricate detail. Each article in this series corresponds to a pull request on a GitHub repository. The code for this article
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Unusual uses of OEIS sequences on GitHub
I went hunting for references to the OEIS in open source code, and found some weird ones. There are not one, but two live-coding music frameworks that use OEIS sequences as a source for "anything that can be sequenced" in music. I'm guessing that's used f
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The OEIS meta sequence and subway stations
A051070 is a sequence about OEIS sequences. a(n) is the n-th term in sequence A_n (or -1 if A_n doesn't have enough terms). So the first term in A051070 is 1 because A000001 is the number of groups of order n, and that sequence has 1 as its entry in index
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Deterministic Primality Testing for Limited Bit Width
Problem: Determine if a 32-bit number is prime (deterministically) Solution: (in C++) // Bases to test. Using the first 4 prime bases makes the test deterministic // for all 32-bit integers. See https://oeis.org/A014233. int64_t bases = {2, 3, 5, 7}; inli
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