corpus.blog
41554 blogs · [ { "id": "01a087a1-71e3-700c-b26c-03563c7fa659", "title": "Solving the Flat Cube", "url": "https://mathenchant.wordpress.com/2026/08/19/solving-the-flat-cube/", "published_at": "2026-08-19T22:40:13+00:00" }, { "id": "01a087a1-71e3-700c-b26c-03563cf2dc62", "title": "What Bad Bases Are Good For", "url": "https://mathenchant.wordpress.com/2026/07/19/what-bad-bases-are-good-for/", "published_at": "2026-07-19T22:35:54+00:00" }, { "id": "01a087a1-71e3-700c-b26c-03563d23a61c", "title": "Seventeen Camels and Where They Can Take You", "url": "https://mathenchant.wordpress.com/2026/06/15/seventeen-camels-and-where-they-can-take-you/", "published_at": "2026-06-15T16:08:34+00:00" }, { "id": "01a087a1-71e3-700c-b26c-03563e1c65ac", "title": "Sorry, Mary", "url": "https://mathenchant.wordpress.com/2026/04/18/sorry-mary/", "published_at": "2026-04-18T18:17:20+00:00" }, { "id": "01a087a1-71e3-700c-b26c-03563eb57b83", "title": "In Praise of Stupid Questions", "url": 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"2024-05-17T16:23:19+00:00" }, { "id": "01a0bb5a-5120-7287-8fce-e178e06b6fac", "title": "“Jewish Mathematics”?", "url": "https://mathenchant.wordpress.com/2024/04/17/jewish-mathematics/", "published_at": "2024-04-18T03:33:59+00:00" }, { "id": "01a0bb5a-5120-7287-8fce-e178e072d58b", "title": "Nine Years of Blogging About Math", "url": "https://mathenchant.wordpress.com/2024/03/17/nine-years-of-blogging-about-math/", "published_at": "2024-03-17T20:27:06+00:00" }, { "id": "01a0bb5a-5120-7287-8fce-e178e0790698", "title": "Plus and Times Set Free", "url": "https://mathenchant.wordpress.com/2024/02/17/plus-and-times-set-free/", "published_at": "2024-02-17T23:34:21+00:00" }, { "id": "01a0bb5a-5120-7287-8fce-e178e0bed2bd", "title": "What “a 96 percent chance” doesn’t mean", "url": "https://mathenchant.wordpress.com/2024/01/15/what-a-96-percent-chance-doesnt-mean/", "published_at": "2024-01-15T06:07:32+00:00" }, { "id": "01a0bb5a-5120-7287-8fce-e178e11e08e9", "title": "Vectors from Leibniz to 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Physics", "url": "https://mathenchant.wordpress.com/2022/06/17/the-remarriage-of-math-and-physics/", "published_at": "2022-06-17T20:35:01+00:00" }, { "id": "01a0bb68-9693-70d7-aef7-0e5a895a950b", "title": "Good Shurik Grothendieck", "url": "https://mathenchant.wordpress.com/2022/05/17/good-shurik-grothendieck/", "published_at": "2022-05-18T02:35:34+00:00" }, { "id": "01a0bb68-9693-70d7-aef7-0e5a89e5f472", "title": "Tricks of the Trade", "url": "https://mathenchant.wordpress.com/2022/04/17/tricks-of-the-trade/", "published_at": "2022-04-18T01:02:54+00:00" }, { "id": "01a0bb68-9693-70d7-aef7-0e5a8ae53685", "title": "Breaking Pi", "url": "https://mathenchant.wordpress.com/2022/03/17/breaking-pi/", "published_at": "2022-03-18T03:35:10+00:00" }, { "id": "01a0bb68-9693-70d7-aef7-0e5a8b2ffb48", "title": "The Clatter of the Primes", "url": "https://mathenchant.wordpress.com/2022/02/16/the-clatter-of-the-primes/", "published_at": "2022-02-17T03:59:13+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed05e2b4791", "title": "Bad Soup", "url": "https://mathenchant.wordpress.com/2022/01/17/bad-soup/", "published_at": "2022-01-17T17:37:50+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed05e835457", "title": "Numbers from Games", "url": "https://mathenchant.wordpress.com/2021/12/17/numbers-from-games/", "published_at": "2021-12-18T03:24:44+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed05f606d70", "title": "Why Names Matter", "url": "https://mathenchant.wordpress.com/2021/11/16/why-names-matter/", "published_at": "2021-11-17T04:47:53+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed05fdc467c", "title": "Here There Be Dragons", "url": "https://mathenchant.wordpress.com/2021/10/16/here-there-be-dragons/", "published_at": "2021-10-17T01:36:22+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed0604891b3", "title": "Miracle People: A “Genius Box” Postscript", "url": "https://mathenchant.wordpress.com/2021/09/16/miracle-people-a-genius-box-postscript/", "published_at": "2021-09-17T01:23:53+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed060bcd9e8", "title": "Reckoning and Reasoning", "url": "https://mathenchant.wordpress.com/2021/08/16/reckoning-and-reasoning/", "published_at": "2021-08-17T00:01:24+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed060ca19c9", "title": "In Praise of Pedantry", "url": "https://mathenchant.wordpress.com/2021/07/16/in-praise-of-pedantry/", "published_at": "2021-07-17T03:05:00+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed0612fbb54", "title": "Going Negative, part 4", "url": "https://mathenchant.wordpress.com/2021/06/16/going-negative-part-4/", "published_at": "2021-06-16T23:04:21+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed061897c46", "title": "Going Negative, part 3", "url": "https://mathenchant.wordpress.com/2021/05/16/going-negative-part-3/", "published_at": "2021-05-17T02:07:57+00:00" }, { "id": "01a0bb6c-d4e5-711f-8666-6ed061b57041", "title": "Who Needs Zero?", "url": 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"01a0bb70-a857-7216-9cd1-462b65cce4bc", "title": "The Positive Side of Impossible", "url": "https://mathenchant.wordpress.com/2020/11/16/the-positive-side-of-impossible/", "published_at": "2020-11-17T02:05:00+00:00" }, { "id": "01a0bb70-a857-7216-9cd1-462b6623ce71", "title": "When 1+1 Equals 0", "url": "https://mathenchant.wordpress.com/2020/10/17/when-11-equals-0/", "published_at": "2020-10-17T04:11:03+00:00" }, { "id": "01a0bb70-a857-7216-9cd1-462b66ccbdb5", "title": "How Can Math Be Wrong?", "url": "https://mathenchant.wordpress.com/2020/09/16/how-can-math-be-wrong/", "published_at": "2020-09-17T03:13:49+00:00" }, { "id": "01a0bb70-a857-7216-9cd1-462b678a882b", "title": "The Muffin Curse", "url": "https://mathenchant.wordpress.com/2020/08/16/the-muffin-curse/", "published_at": "2020-08-17T03:22:03+00:00" }, { "id": "01a0bb70-a857-7216-9cd1-462b6872dd46", "title": "Math, Games, and Ronald Graham", "url": "https://mathenchant.wordpress.com/2020/07/16/math-games-and-ronald-graham/", "published_at": "2020-07-17T03:13:11+00:00" }, { "id": "01a0bb70-a857-7216-9cd1-462b68d9b6b1", "title": "The Mathematics of Irony", "url": "https://mathenchant.wordpress.com/2020/06/16/the-mathematics-of-irony/", "published_at": "2020-06-17T03:26:40+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-66170d490e1f", "title": "Confessions of a Conway Groupie", "url": "https://mathenchant.wordpress.com/2020/05/16/confessions-of-a-conway-groupie/", "published_at": "2020-05-17T02:42:55+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-66170dab3065", "title": "Air from Archimedes", "url": "https://mathenchant.wordpress.com/2020/04/16/air-from-archimedes/", "published_at": "2020-04-17T02:05:48+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-66170e2361ef", "title": "The Square Root of Pi", "url": "https://mathenchant.wordpress.com/2020/03/10/the-square-root-of-pi/", "published_at": "2020-03-10T16:48:02+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-66170e64de77", "title": "Chess with the Devil", "url": "https://mathenchant.wordpress.com/2020/02/17/chess-with-the-devil/", "published_at": "2020-02-17T23:00:53+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-66170eb4b7c2", "title": "What Proof Is Best?", "url": "https://mathenchant.wordpress.com/2020/01/24/what-proof-is-best/", "published_at": "2020-01-24T19:19:12+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-66170facc65e", "title": "The Null Salad", "url": "https://mathenchant.wordpress.com/2019/12/23/the-null-salad/", "published_at": "2019-12-24T02:55:44+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-66170fb0167c", "title": "Let Us Define Our Terms", "url": "https://mathenchant.wordpress.com/2019/11/30/let-us-define-our-terms/", "published_at": "2019-11-30T23:00:23+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-661710877b60", "title": "Guess Again: The Ehrenfeucht-Mycielski Sequence", "url": "https://mathenchant.wordpress.com/2019/10/16/guess-again-the-ehrenfeucht-mycielski-sequence/", "published_at": "2019-10-16T22:46:36+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-661710d84904", "title": "Sphere-Packing", "url": "https://mathenchant.wordpress.com/2019/09/16/sphere-packing/", "published_at": "2019-09-17T02:43:59+00:00" }, { "id": "01a0bb74-26f0-7001-af3a-6617118aa6f9", "title": "Calculus is Deeply Irrational", "url": "https://mathenchant.wordpress.com/2019/08/16/calculus-is-deeply-irrational/", "published_at": "2019-08-17T03:33:57+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f4326c823", "title": "My Favorite Theorem", "url": "https://mathenchant.wordpress.com/2019/07/07/my-favorite-theorem/", "published_at": "2019-07-07T23:47:48+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f4402ccae", "title": "Mathematical Flimflam", "url": "https://mathenchant.wordpress.com/2019/06/16/mathematical-flimflam/", "published_at": "2019-06-16T22:20:11+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f4476f1b6", "title": "Carnival of Mathematics #170", "url": "https://mathenchant.wordpress.com/2019/06/06/carnival-of-mathematics-170/", "published_at": "2019-06-07T03:03:11+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f44c53c50", "title": "A Mathematician in the Jury Box, or, “But how should we define ‘intoxicated’?”", "url": "https://mathenchant.wordpress.com/2019/05/16/a-mathematician-in-the-jury-box-or-but-how-should-we-define-intoxicated/", "published_at": "2019-05-17T03:24:58+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f45c124cc", "title": "Mazes, Puzzles, and Proofs", "url": "https://mathenchant.wordpress.com/2019/04/17/mazes-puzzles-and-proofs/", "published_at": "2019-04-17T04:08:51+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f45f051b8", "title": "Flip Your Students, Flip Yourself", "url": "https://mathenchant.wordpress.com/2019/03/16/flip-your-students-flip-yourself/", "published_at": "2019-03-16T22:54:03+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f46284a8e", "title": "Who Mourns the Tenth Heegner Number?", "url": "https://mathenchant.wordpress.com/2019/02/16/who-mourns-the-tenth-heegner-number/", "published_at": "2019-02-17T03:25:03+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f4699299a", "title": "The Magic of Nine", "url": "https://mathenchant.wordpress.com/2019/01/16/the-magic-of-nine/", "published_at": "2019-01-17T04:08:32+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f4771d605", "title": "Introducing “Thirdsday”", "url": "https://mathenchant.wordpress.com/2018/12/31/introducing-thirdsday/", "published_at": "2018-12-31T20:40:52+00:00" }, { "id": "01a0bb77-6082-70d4-b818-e67f4791ad03", "title": "Stance and distance in popular writing about math", "url": "https://mathenchant.wordpress.com/2018/12/17/stance-and-distance-in-popular-writing-about-math/", "published_at": "2018-12-17T05:04:32+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd509f1bbf7", "title": "Between the World and the Mind", "url": "https://mathenchant.wordpress.com/2018/11/17/between-the-world-and-the-mind/", "published_at": "2018-11-17T05:50:08+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50a6d6e44", "title": "ChipChip: A new sort of sorting", "url": "https://mathenchant.wordpress.com/2018/10/09/chipchip-a-new-sort-of-sorting/", "published_at": "2018-10-09T13:35:21+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50b451dfc", "title": "A New Game with Infinity", "url": "https://mathenchant.wordpress.com/2018/09/16/a-new-game-with-infinity/", "published_at": "2018-09-17T03:30:20+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50c089fa0", "title": "Knots and Narnias", "url": "https://mathenchant.wordpress.com/2018/08/16/knots-and-narnias/", "published_at": "2018-08-17T03:11:45+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50c0f5b59", "title": "A pair of shorts", "url": "https://mathenchant.wordpress.com/2018/07/16/a-pair-of-shorts/", "published_at": "2018-07-17T00:02:51+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50d0d7c5d", "title": "Why Does Exploding Dots Work?", "url": "https://mathenchant.wordpress.com/2018/06/16/why-does-exploding-dots-work/", "published_at": "2018-06-17T02:40:03+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50df06228", "title": "Time and Tesseracts", "url": "https://mathenchant.wordpress.com/2018/05/16/time-and-tesseracts/", "published_at": "2018-05-17T03:35:38+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50e526df0", "title": "Who Knows Two?", "url": "https://mathenchant.wordpress.com/2018/04/16/who-knows-two/", "published_at": "2018-04-17T02:12:07+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50f0b4c49", "title": "The Genius Box", "url": "https://mathenchant.wordpress.com/2018/03/16/the-genius-box/", "published_at": "2018-03-17T02:58:12+00:00" }, { "id": "01a0bb7a-b6bb-7011-bf18-ddd50fc2b5b7", "title": "Roasting a Dodo and Biking on Mars: The Magic of Dimensional Analysis", "url": "https://mathenchant.wordpress.com/2018/02/16/roasting-a-dodo-and-biking-on-mars-the-magic-of-dimensional-analysis/", "published_at": "2018-02-16T18:25:47+00:00" } ] posts Claim your blog
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| monthly writings in and around mathematics by James Propp

mathenchant.wordpress.com

2026

Solving the Flat Cubeoriginal ↗
19 Aug 2026
What Bad Bases Are Good Fororiginal ↗
19 Jul 2026
Seventeen Camels and Where They Can Take Youoriginal ↗
15 Jun 2026
Sorry, Maryoriginal ↗
18 Apr 2026
In Praise of Stupid Questionsoriginal ↗
12 Mar 2026

2025

Is Matrix Multiplication Ugly?original ↗
21 Nov 2025
Picturing Mathematicsoriginal ↗
18 Oct 2025
Randomness Made to Order, part 1original ↗
24 Aug 2025
When .999… Isn’t 1original ↗
17 Jul 2025
Remembering Kellyoriginal ↗
17 Jun 2025
Math and the Museumoriginal ↗
22 May 2025
Is 1 Prime, and Does It Matter?original ↗
21 Apr 2025
How Pi Almost Wasn’toriginal ↗
13 Mar 2025
Dedekind’s Subtle Knifeoriginal ↗
17 Feb 2025
The Real Line versus the Fakesoriginal ↗
17 Jan 2025

2024

When 1+1+1 Equals 1original ↗
19 Dec 2024
Can Math Save Your Soul?original ↗
17 Nov 2024
Industrious Diceoriginal ↗
17 Oct 2024
Our Fractional Universeoriginal ↗
17 Sept 2024
Math for English Majors and Everybody Elseoriginal ↗
18 Aug 2024
When 1+1 Equals 1original ↗
19 Jul 2024
Math’s Mutable Rulesoriginal ↗
18 Jun 2024
Zero-to-the-Zero and the Do-Nothing Machineoriginal ↗
17 May 2024
“Jewish Mathematics”?original ↗
18 Apr 2024
Nine Years of Blogging About Mathoriginal ↗
17 Mar 2024
Plus and Times Set Freeoriginal ↗
17 Feb 2024
What “a 96 percent chance” doesn’t meanoriginal ↗
15 Jan 2024

2023

Vectors from Leibniz to Einsteinoriginal ↗
17 Dec 2023
Numbers Far Afieldoriginal ↗
17 Nov 2023
Marvelous Arithmetics of Distanceoriginal ↗
18 Oct 2023
When Five Isn’t Primeoriginal ↗
18 Sept 2023
Math for Your Earoriginal ↗
18 Aug 2023
The Triumphs of Sisyphusoriginal ↗
17 Jul 2023
What is a Matrix?original ↗
16 Jun 2023
Hamilton’s Quaternions, or, The Trouble with Triplesoriginal ↗
18 May 2023
Seekers of the One-Stoneoriginal ↗
21 Apr 2023
Unlimited Powersoriginal ↗
19 Mar 2023
Things, Names, and Numbersoriginal ↗
17 Feb 2023
Denominators and Doppelgängersoriginal ↗
18 Jan 2023

2022

Beneath (and Beyond)original ↗
17 Dec 2022
The Infinite Stairwayoriginal ↗
17 Nov 2022
Teaching with Magic Paperoriginal ↗
15 Oct 2022
What Lovelace Did: From Bombelli to Bernoulli to Babbageoriginal ↗
17 Sept 2022
Let x Equal xoriginal ↗
17 Aug 2022
Twisty Numbers for a Screwy Universeoriginal ↗
17 Jul 2022
The Remarriage of Math and Physicsoriginal ↗
17 Jun 2022
Good Shurik Grothendieckoriginal ↗
18 May 2022
Tricks of the Tradeoriginal ↗
18 Apr 2022
Breaking Pioriginal ↗
18 Mar 2022
The Clatter of the Primesoriginal ↗
17 Feb 2022
Bad Souporiginal ↗
17 Jan 2022

2021

Numbers from Gamesoriginal ↗
18 Dec 2021
Why Names Matteroriginal ↗
17 Nov 2021
Here There Be Dragonsoriginal ↗
17 Oct 2021
Miracle People: A “Genius Box” Postscriptoriginal ↗
17 Sept 2021
Reckoning and Reasoningoriginal ↗
17 Aug 2021
In Praise of Pedantryoriginal ↗
17 Jul 2021
Going Negative, part 4original ↗
16 Jun 2021
Going Negative, part 3original ↗
17 May 2021
Who Needs Zero?original ↗
16 Apr 2021
Dividing by Zerooriginal ↗
17 Mar 2021
Thoughts from the Outfieldoriginal ↗
17 Feb 2021
My Life with Aztec Diamondsoriginal ↗
17 Jan 2021

2020

Children of the Labyrinthoriginal ↗
14 Dec 2020
The Positive Side of Impossibleoriginal ↗
17 Nov 2020
When 1+1 Equals 0original ↗
17 Oct 2020
How Can Math Be Wrong?original ↗
17 Sept 2020
The Muffin Curseoriginal ↗
17 Aug 2020
Math, Games, and Ronald Grahamoriginal ↗
17 Jul 2020
The Mathematics of Ironyoriginal ↗
17 Jun 2020
Confessions of a Conway Groupieoriginal ↗
17 May 2020
Air from Archimedesoriginal ↗
17 Apr 2020
The Square Root of Pioriginal ↗
10 Mar 2020
Chess with the Deviloriginal ↗
17 Feb 2020
What Proof Is Best?original ↗
24 Jan 2020

2019

The Null Saladoriginal ↗
24 Dec 2019
Let Us Define Our Termsoriginal ↗
30 Nov 2019
Guess Again: The Ehrenfeucht-Mycielski Sequenceoriginal ↗
16 Oct 2019
Sphere-Packingoriginal ↗
17 Sept 2019
Calculus is Deeply Irrationaloriginal ↗
17 Aug 2019
My Favorite Theoremoriginal ↗
7 Jul 2019
Mathematical Flimflamoriginal ↗
16 Jun 2019
Carnival of Mathematics #170original ↗
7 Jun 2019
A Mathematician in the Jury Box, or, “But how should we define ‘intoxicated’?”original ↗
17 May 2019
Mazes, Puzzles, and Proofsoriginal ↗
17 Apr 2019
Flip Your Students, Flip Yourselforiginal ↗
16 Mar 2019
Who Mourns the Tenth Heegner Number?original ↗
17 Feb 2019
The Magic of Nineoriginal ↗
17 Jan 2019

2018

Introducing “Thirdsday”original ↗
31 Dec 2018
Stance and distance in popular writing about mathoriginal ↗
17 Dec 2018
Between the World and the Mindoriginal ↗
17 Nov 2018
ChipChip: A new sort of sortingoriginal ↗
9 Oct 2018
A New Game with Infinityoriginal ↗
17 Sept 2018
Knots and Narniasoriginal ↗
17 Aug 2018
A pair of shortsoriginal ↗
17 Jul 2018
Why Does Exploding Dots Work?original ↗
17 Jun 2018
Time and Tesseractsoriginal ↗
17 May 2018
Who Knows Two?original ↗
17 Apr 2018
The Genius Boxoriginal ↗
17 Mar 2018
Roasting a Dodo and Biking on Mars: The Magic of Dimensional Analysisoriginal ↗
16 Feb 2018
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