41554 blogs · [ { "id": "01a087b0-9ffc-7223-aa29-2c261d39db1c", "title": "Now blogging on Bluesky", "url": "https://njohnston.ca/2024/11/now-blogging-on-bluesky/", "published_at": "2024-11-22T14:19:24+00:00" }, { "id": "01a087b0-9ffc-7223-aa29-2c261d8f38fd", "title": "Minimal injective superstrings: A simpler generalization of superpermutations", "url": "https://njohnston.ca/2024/05/minimal-injective-superstrings-a-simpler-generalization-of-superpermutations/", "published_at": "2024-05-06T18:52:16+00:00" }, { "id": "01a087b0-9ffc-7223-aa29-2c261e1676bc", "title": "Herschel tracks in Conway’s Game of Life – Part 1 – Making oscillators and glider guns of any period 61 or larger", "url": "https://njohnston.ca/2024/04/herschel-tracks-in-conways-game-of-life-part-1-making-oscillators-and-glider-guns-of-any-period-61-or-larger/", "published_at": "2024-04-19T12:49:50+00:00" }, { "id": "01a087b0-9ffc-7223-aa29-2c261e8f6442", "title": "Solving the “Lights Out” Puzzle via Linear Algebra", "url": "https://njohnston.ca/2024/03/solving-the-lights-out-puzzle-via-linear-algebra/", "published_at": "2024-03-26T12:22:24+00:00" }, { "id": "01a087b0-9ffc-7223-aa29-2c261eaea016", "title": "First true period 15 and 16 glider guns found in Conway’s Game of Life", "url": "https://njohnston.ca/2024/03/first-true-period-15-and-16-glider-guns-found-in-conways-game-of-life/", "published_at": "2024-03-18T08:46:43+00:00" }, { "id": "01a087b0-9ffc-7223-aa29-2c261ee49cbe", "title": "What is the Maximum Possible Area of 3 Circles in a Triangle?", "url": "https://njohnston.ca/2024/03/what-is-the-maximum-possible-area-of-3-circles-in-a-triangle/", "published_at": "2024-03-13T16:29:39+00:00" }, { "id": "01a0bdc6-0ae2-730a-bb7a-84b8e1ade092", "title": "Taylor Polynomials from Orthogonal Projections", "url": "https://njohnston.ca/2018/07/taylor-polynomials-from-orthogonal-projections/", "published_at": "2018-07-23T22:36:43+00:00" }, { "id": "01a0bdc6-0ae2-730a-bb7a-84b8e223243f", "title": "How to compute hard-to-compute matrix norms", "url": "https://njohnston.ca/2016/01/how-to-compute-hard-to-compute-matrix-norms/", "published_at": "2016-01-12T02:39:22+00:00" }, { "id": "01a0bdc6-0ae2-730a-bb7a-84b8e2e9fb0b", "title": "Introducing QETLAB: A MATLAB toolbox for quantum entanglement", "url": "https://njohnston.ca/2015/04/introducing-qetlab-a-matlab-toolbox-for-quantum-entanglement/", "published_at": "2015-04-14T16:04:00+00:00" }, { "id": "01a0bdc6-0ae2-730a-bb7a-84b8e3d63e1e", "title": "“Obvious” Does Not Imply “True”: The Minimal Superpermutation Conjecture is False", "url": "https://njohnston.ca/2014/08/obvious-does-not-imply-true-the-minimal-superpermutation-conjecture-is-false/", "published_at": "2014-08-22T14:44:58+00:00" }, { "id": "01a0bdc6-0ae2-730a-bb7a-84b8e3dbda3e", "title": "All Minimal Superpermutations on Five Symbols Have Been Found", "url": "https://njohnston.ca/2014/08/all-minimal-superpermutations-on-five-symbols-have-been-found/", "published_at": "2014-08-13T16:52:32+00:00" }, { "id": "01a0bdc6-0ae2-730a-bb7a-84b8e478df66", "title": "What the Operator-Schmidt Decomposition Tells Us About Entanglement", "url": "https://njohnston.ca/2014/06/what-the-operator-schmidt-decomposition-tells-us-about-entanglement/", "published_at": "2014-06-27T19:30:38+00:00" }, { "id": "01a0bdcf-e5a6-7087-a9e4-12cf64736ca8", "title": "Counting the Possible Orderings of Pairwise Multiplication", "url": "https://njohnston.ca/2014/02/counting-the-possible-orderings-of-pairwise-multiplication/", "published_at": "2014-02-12T18:26:43+00:00" }, { "id": "01a0bdcf-e5a6-7087-a9e4-12cf64ac5229", "title": "In Search of a 4-by-11 Matrix", "url": "https://njohnston.ca/2013/10/in-search-of-a-4-by-11-matrix/", "published_at": "2013-10-01T17:47:56+00:00" }, { "id": "01a0bdcf-e5a6-7087-a9e4-12cf65588d14", "title": "The Spectrum of the Partial Transpose of a Density Matrix", "url": "https://njohnston.ca/2013/07/the-spectrum-of-the-partial-transpose/", "published_at": "2013-07-03T19:00:51+00:00" }, { "id": "01a0bdcf-e5a6-7087-a9e4-12cf65f4725e", "title": "The Minimal Superpermutation Problem", "url": "https://njohnston.ca/2013/04/the-minimal-superpermutation-problem/", "published_at": "2013-04-10T18:19:43+00:00" }, { "id": "01a0bdcf-e5a6-7087-a9e4-12cf6639617d", "title": "How to Construct Minimal Unextendible Product Bases", "url": "https://njohnston.ca/2013/03/how-to-construct-minimal-upbs/", "published_at": "2013-03-14T21:27:22+00:00" }, { "id": "01a0bdcf-e5a6-7087-a9e4-12cf66bbaf9a", "title": "Norms and Dual Norms as Supremums and Infimums", "url": "https://njohnston.ca/2012/05/norms-and-dual-norms-as-supremums-and-infimums/", "published_at": "2012-05-26T17:48:00+00:00" }, { "id": "01a0bdd3-ceba-71df-ae27-78131ddfd6cb", "title": "Counting and Solving Final Fantasy XIII-2’s Clock Puzzles", "url": "https://njohnston.ca/2012/02/counting-and-solving-final-fantasy-xiii-2s-clock-puzzles/", "published_at": "2012-02-06T16:19:06+00:00" }, { "id": "01a0bdd3-ceba-71df-ae27-78131e4711eb", "title": "MATLAB Scripts for Computing Completely Bounded Norms via Semidefinite Programming", "url": "https://njohnston.ca/2011/07/matlab-scripts-for-computing-the-completely-bounded-and-diamond-norms/", "published_at": "2011-07-23T20:45:06+00:00" }, { "id": "01a0bdd3-ceba-71df-ae27-78131e7a6ce3", "title": "Separability-Preserving Operators in Entanglement Theory", "url": "https://njohnston.ca/2011/06/separability-preserving-operators-in-entanglement-theory/", "published_at": "2011-06-14T20:19:40+00:00" }, { "id": "01a0bdd3-ceba-71df-ae27-78131ec93601", "title": "The Q-Toothpick Cellular Automaton", "url": "https://njohnston.ca/2011/03/the-q-toothpick-cellular-automaton/", "published_at": "2011-03-26T13:48:46+00:00" }, { "id": "01a0bdd3-ceba-71df-ae27-78131fb43aca", "title": "The Maximum Score in the Game “Entanglement” is 9080", "url": "https://njohnston.ca/2011/01/the-maximum-score-in-the-game-entanglement-is-9080/", "published_at": "2011-01-21T23:05:33+00:00" }, { "id": "01a0bdd3-ceba-71df-ae27-781320686a3f", "title": "Further Variants of the “Look-and-Say” Sequence", "url": "https://njohnston.ca/2011/01/further-variants-of-the-look-and-say-sequence/", "published_at": "2011-01-13T09:52:42+00:00" }, { "id": "01a0bdd7-1f1e-7377-a97c-893ec42976af", "title": "Statistical Analysis of Password Strength via Gawker’s Leaked Database", "url": "https://njohnston.ca/2010/12/statistical-analysis-of-password-strength-via-gawkers-leaked-database/", "published_at": "2010-12-16T03:49:37+00:00" }, { "id": "01a0bdd7-1f1e-7377-a97c-893ec5144d9e", "title": "The Binary “Look-and-Say” Sequence", "url": "https://njohnston.ca/2010/11/the-binary-look-and-say-sequence/", "published_at": "2010-11-07T22:00:10+00:00" }, { "id": "01a0bdd7-1f1f-71d6-b6bd-58116702d4b7", "title": "A Derivation of Conway’s Degree-71 “Look-and-Say” Polynomial", "url": "https://njohnston.ca/2010/10/a-derivation-of-conways-degree-71-look-and-say-polynomial/", "published_at": "2010-11-01T02:05:49+00:00" }, { "id": "01a0bdd7-1f1f-71d6-b6bd-581167b875d9", "title": "Isometries of the Vector p-Norms: Signed and Complex Permutation Matrices", "url": "https://njohnston.ca/2010/09/isometries-of-the-vector-p-norms-signed-and-complex-permutation-matrices/", "published_at": "2010-09-17T12:00:39+00:00" }, { "id": "01a0bdd7-1f1f-71d6-b6bd-581167e6126b", "title": "P-Value Calculators and Graphers in Javascript", "url": "https://njohnston.ca/2010/09/p-value-calculators-and-graphers-in-javascript/", "published_at": "2010-09-05T20:37:06+00:00" }, { "id": "01a0bdd7-1f1f-71d6-b6bd-581168c8a003", "title": "Isometries of Unitarily-Invariant Complex Matrix Norms", "url": "https://njohnston.ca/2010/08/isometries-of-unitarily-invariant-complex-matrix-norms/", "published_at": "2010-08-15T19:47:25+00:00" }, { "id": "01a0bddb-69ee-736d-a567-0913b8af54af", "title": "An Introduction to Linear Preserver Problems", "url": "https://njohnston.ca/2010/08/an-introduction-to-linear-preserver-problems/", "published_at": "2010-08-05T17:28:05+00:00" }, { "id": "01a0bddb-69ee-736d-a567-0913b95083d4", "title": "Lifeline is Now Online", "url": "https://njohnston.ca/2010/03/lifeline-is-now-online/", "published_at": "2010-03-22T20:23:46+00:00" }, { "id": "01a0bddb-69ee-736d-a567-0913b9e3403e", "title": "31,192-generation methuselah found in Conway's Game of Life", "url": "https://njohnston.ca/2010/01/31192-generation-methuselah-found-in-conways-game-of-life/", "published_at": "2010-01-15T12:00:29+00:00" }, { "id": "01a0bddb-69ee-736d-a567-0913ba948c52", "title": "Nerd Culture Calculus Worksheets", "url": "https://njohnston.ca/2009/12/nerd-culture-calculus-worksheets/", "published_at": "2009-12-25T05:00:52+00:00" }, { "id": "01a0bddb-69ee-736d-a567-0913bb26c979", "title": "The Other Superoperator Isomorphism", "url": "https://njohnston.ca/2009/11/the-other-linear-map-isomorphism/", "published_at": "2009-11-20T12:00:21+00:00" }, { "id": "01a0bddb-69ee-736d-a567-0913bbd6d5be", "title": "Keep the \"Info\" Before the \"Graphic\"", "url": "https://njohnston.ca/2009/11/keep-info-before-graphic/", "published_at": "2009-11-13T13:00:57+00:00" }, { "id": "01a0bdde-3aaf-712c-aa2b-95e4a2115a1a", "title": "Approximating the Distribution of Schmidt Vector Norms", "url": "https://njohnston.ca/2009/11/approximating-the-distribution-of-schmidt-vector-norms/", "published_at": "2009-11-06T12:00:44+00:00" }, { "id": "01a0bdde-3aaf-712c-aa2b-95e4a2ab6f11", "title": "Spaceship Speed Limits in \"B3\" Life-Like Cellular Automata", "url": "https://njohnston.ca/2009/10/spaceship-speed-limits-in-life-like-cellular-automata/", "published_at": "2009-10-30T12:00:07+00:00" }, { "id": "01a0bdde-3aaf-712c-aa2b-95e4a365cfb6", "title": "The Equivalences of the Choi-Jamiolkowski Isomorphism (Part II)", "url": "https://njohnston.ca/2009/10/the-equivalences-of-the-choi-jamiolkowski-isomorphism-part-ii/", "published_at": "2009-10-23T12:00:10+00:00" }, { "id": "01a0bdde-3aaf-712c-aa2b-95e4a3a8764a", "title": "The Equivalences of the Choi-Jamiolkowski Isomorphism (Part I)", "url": "https://njohnston.ca/2009/10/the-equivalences-of-the-choi-jamiolkowski-isomorphism-part-i/", "published_at": "2009-10-16T14:00:14+00:00" }, { "id": "01a0bdde-3ab0-7317-b999-e0c4ccf8e0fd", "title": "IMDb Movie Ratings Over the Years", "url": "https://njohnston.ca/2009/10/imdb-movie-ratings-over-the-years/", "published_at": "2009-10-09T12:00:55+00:00" }, { "id": "01a0bdde-3ab0-7317-b999-e0c4cd44ceac", "title": "An Introduction to Schmidt Norms", "url": "https://njohnston.ca/2009/10/an-introduction-to-schmidt-norms/", "published_at": "2009-10-02T12:00:58+00:00" }, { "id": "01a0bde0-d745-73e8-9e2f-b52b9a4b0d9d", "title": "Quantum Semidefinite Programs", "url": "https://njohnston.ca/2009/09/quantum-semidefinite-programs/", "published_at": "2009-09-25T12:00:28+00:00" }, { "id": "01a0bde0-d746-70f1-aea4-9ec3588b42d8", "title": "Golly 2.1 Released (with Online Archive Support!)", "url": "https://njohnston.ca/2009/09/golly-2-1-with-online-archive-support/", "published_at": "2009-09-18T12:00:30+00:00" }, { "id": "01a0bde0-d746-70f1-aea4-9ec358bcdb55", "title": "No, Primes with Millions of Digits Are Not Useful for Cryptography", "url": "https://njohnston.ca/2009/09/no-primes-with-millions-of-digits-are-not-useful-for-cryptography/", "published_at": "2009-09-11T12:00:16+00:00" }, { "id": "01a0bde0-d746-70f1-aea4-9ec35971547c", "title": "No Similarity-Invariant Matrix Norm", "url": "https://njohnston.ca/2009/09/no-similarity-invariant-matrix-norm/", "published_at": "2009-09-04T12:00:20+00:00" }, { "id": "01a0bde0-d746-70f1-aea4-9ec359a2dc27", "title": "Generating Sequences of Primes in Conway's Game of Life", "url": "https://njohnston.ca/2009/08/generating-sequences-of-primes-in-conways-game-of-life/", "published_at": "2009-08-28T12:00:11+00:00" }, { "id": "01a0bde0-d746-70f1-aea4-9ec35a86cda2", "title": "Ky Fan Norms, Schatten Norms, and Everything in Between", "url": "https://njohnston.ca/2009/08/ky-fan-norms-schatten-norms-and-everything-in-between/", "published_at": "2009-08-21T12:00:22+00:00" }, { "id": "01a0bde3-4f46-71ad-a69a-32cb96c0cebf", "title": "LaTeX Poster Template", "url": "https://njohnston.ca/2009/08/latex-poster-template/", "published_at": "2009-08-14T12:00:55+00:00" }, { "id": "01a0bde3-4f46-71ad-a69a-32cb9713c095", "title": "Sylvester’s Law of Inertia and *-Congruence", "url": "https://njohnston.ca/2009/08/sylvesters-law-of-inertia-and-congruence/", "published_at": "2009-08-07T12:00:56+00:00" }, { "id": "01a0bde3-4f46-71ad-a69a-32cb97fd581a", "title": "The Maximal Lifespan of Patterns in Conway's Game of Life", "url": "https://njohnston.ca/2009/07/the-maximal-lifespan-of-patterns-in-conways-game-of-life/", "published_at": "2009-07-31T12:00:10+00:00" }, { "id": "01a0bde3-4f46-71ad-a69a-32cb98f937b9", "title": "A Brief Introduction to the Multiplicative Domain and its Role in Quantum Error Correction", "url": "https://njohnston.ca/2009/07/a-brief-introduction-to-the-multiplicative-domain-and-its-role-in-quantum-error-correction/", "published_at": "2009-07-24T04:00:22+00:00" }, { "id": "01a0bde3-4f46-71ad-a69a-32cb996f25c3", "title": "Longevity in Conway's Game of Life Revisited", "url": "https://njohnston.ca/2009/07/longevity-in-conways-game-of-life-revisited/", "published_at": "2009-07-17T12:00:20+00:00" }, { "id": "01a0bde3-4f46-71ad-a69a-32cb9a1f96d4", "title": "The Online Life-Like CA Soup Search", "url": "https://njohnston.ca/2009/07/the-online-life-like-ca-soup-search/", "published_at": "2009-07-11T18:42:24+00:00" }, { "id": "01a0bde5-c2da-70b4-8984-0d957cdbd5b6", "title": "A Backward Triangle Inequality for Matrices", "url": "https://njohnston.ca/2009/07/a-backward-triangle-inequality-for-matrices/", "published_at": "2009-07-03T20:00:08+00:00" }, { "id": "01a0bde5-c2da-70b4-8984-0d957d9090c4", "title": "Longest-Lived Soup Density in Conway's Game of Life", "url": "https://njohnston.ca/2009/06/longest-lived-soup-density-in-conways-game-of-life/", "published_at": "2009-06-26T04:00:40+00:00" }, { "id": "01a0bde5-c2da-70b4-8984-0d957dd7d5ee", "title": "The Collatz Conjecture as a Fractal", "url": "https://njohnston.ca/2009/06/the-collatz-conjecture-as-a-fractal/", "published_at": "2009-06-20T04:00:21+00:00" }, { "id": "01a0bde5-c2da-70b4-8984-0d957eb754c0", "title": "11630 is the First Uninteresting Number", "url": "https://njohnston.ca/2009/06/11630-is-the-first-uninteresting-number/", "published_at": "2009-06-12T12:00:28+00:00" }, { "id": "01a0bde5-c2da-70b4-8984-0d957ee34d1b", "title": "Unital Channel Eigenvalue Majorization", "url": "https://njohnston.ca/2009/06/unital-channel-eigenvalue-majorization/", "published_at": "2009-06-06T04:00:30+00:00" }, { "id": "01a0bde5-c2da-70b4-8984-0d957f7b2659", "title": "Corrected Math News: Iraq-born teen cracks maths puzzle", "url": "https://njohnston.ca/2009/06/corrected-math-news-iraq-born-teen-cracks-maths-puzzle/", "published_at": "2009-06-01T20:49:16+00:00" }, { "id": "01a0bde8-3a20-73c8-a28a-e41786bb1bf7", "title": "Math in the Movies: Up", "url": "https://njohnston.ca/2009/05/math-in-the-movies-up/", "published_at": "2009-05-30T20:27:17+00:00" }, { "id": "01a0bde8-3a20-73c8-a28a-e4178726112e", "title": "Rectangular Oscillators in the 2×2 (B36/S125) Cellular Automaton", "url": "https://njohnston.ca/2009/05/rectangular-oscillators-in-the-2x2-b36s125-cellular-automaton/", "published_at": "2009-05-22T04:00:36+00:00" }, { "id": "01a0bde8-3a20-73c8-a28a-e4178748c808", "title": "Does Wolfram Alpha Live up to the Hype?", "url": "https://njohnston.ca/2009/05/does-wolfram-alpha-live-up-to-the-hype/", "published_at": "2009-05-18T18:47:23+00:00" }, { "id": "01a0bde8-3a20-73c8-a28a-e417875a2583", "title": "TQC 2009", "url": "https://njohnston.ca/2009/05/tqc-2009/", "published_at": "2009-05-14T00:00:35+00:00" }, { "id": "01a0bde8-3a20-73c8-a28a-e41787a69c15", "title": "On Maximal Self-Avoiding Walks", "url": "https://njohnston.ca/2009/05/on-maximal-self-avoiding-walks/", "published_at": "2009-05-05T15:18:06+00:00" }, { "id": "01a0bde8-3a20-73c8-a28a-e41787dc775e", "title": "Counting Lakes", "url": "https://njohnston.ca/2009/02/counting-lakes/", "published_at": "2009-02-07T00:00:52+00:00" }, { "id": "01a0bdec-7b0f-7336-bf9e-a9b5e0d4b813", "title": "My New Project: Conway’s Game of Life", "url": "https://njohnston.ca/2009/01/my-new-project-conways-game-of-life/", "published_at": "2009-01-17T00:00:17+00:00" }, { "id": "01a0bdec-7b0f-7336-bf9e-a9b5e145172c", "title": "LaTeX CV Template", "url": "https://njohnston.ca/2008/12/latex-cv-template/", "published_at": "2008-12-10T00:00:46+00:00" }, { "id": "01a0bdec-7b0f-7336-bf9e-a9b5e1f10a54", "title": "A Case for Canvas", "url": "https://njohnston.ca/2008/10/a-case-for-canvas/", "published_at": "2008-10-31T00:00:57+00:00" } ] posts Claim your blog
Back to njohnston.ca
Blog · corpus.blog/blogs/njohnston.ca/posts

njohnston.ca

njohnston.ca

2024

2018

2016

2015

2014

2013

2012

2011

2010

2009

2008