All posts
abakcus.com
abakcus.com
2026
19 Jun 2026
19 Jun 2026
9 Jun 2026
9 Jun 2026
99 Variations on a Proof — Philip Ording on Mathematical StyleRead at abakcus.com (opens in a new tab)
1 Jun 2026
1 Jun 2026
30 May 2026
30 May 2026
Here We Are: Notes for Living on Planet Earth — Oliver Jeffers, Apple TV+Read at abakcus.com (opens in a new tab)
29 May 2026
29 May 2026
27 May 2026
27 May 2026
24 May 2026
24 May 2026
24 May 2026
24 May 2026
22 May 2026
22 May 2026
22 May 2026
22 May 2026
18 May 2026
18 May 2026
13 May 2026
13 May 2026
Compass, Ruler, and Silence — On Eric Broug's Islamic Geometric PatternsRead at abakcus.com (opens in a new tab)
7 May 2026
7 May 2026
The Equations That Forgot They Were Equations — Alejandro Guijarro's MomentumRead at abakcus.com (opens in a new tab)
5 May 2026
5 May 2026
René Magritte's The Blank Signature: A Journey Through the Mind-Bending Layers of RealityRead at abakcus.com (opens in a new tab)
3 May 2026
3 May 2026
Drawing a Chair 64 Times: Erich Dieckmann and the Geometry of SittingRead at abakcus.com (opens in a new tab)
2 May 2026
2 May 2026
1 May 2026
1 May 2026
Al-Jaghmini's Al-Mulakhkhas: The Astronomy Textbook That Outlived an EmpireRead at abakcus.com (opens in a new tab)
30 Apr 2026
30 Apr 2026
27 Apr 2026
27 Apr 2026
21 Apr 2026
21 Apr 2026
The Patterns No Hand Could Have Drawn — Specimens of Fancy TurningRead at abakcus.com (opens in a new tab)
21 Apr 2026
21 Apr 2026
A Number That Cannot Be the Smallest — A Proof That √2 Is IrrationalRead at abakcus.com (opens in a new tab)
21 Apr 2026
21 Apr 2026
Dinara Kasko's Geometrical Kinetic Tarts — Sculpture You EatRead at abakcus.com (opens in a new tab)
19 Apr 2026
19 Apr 2026
19 Apr 2026
19 Apr 2026
19 Apr 2026
19 Apr 2026
18 Apr 2026
18 Apr 2026
17 Apr 2026
17 Apr 2026
Arto Inkala's world's hardest Sudoku — 23 clues, one solution, three months of workRead at abakcus.com (opens in a new tab)
14 Apr 2026
14 Apr 2026
MIT's 1869 Algebra Entrance Exam — Seven Questions That Haven't ChangedRead at abakcus.com (opens in a new tab)
13 Apr 2026
13 Apr 2026
11 Apr 2026
11 Apr 2026
The Geometry Behind Pringles — Hyperbolic Paraboloids, Saddle Surfaces, and Why the Stack HoldsRead at abakcus.com (opens in a new tab)
10 Apr 2026
10 Apr 2026
Einstein's Zurich Notebook — The Notebook Where General Relativity Didn't Work YetRead at abakcus.com (opens in a new tab)
9 Apr 2026
9 Apr 2026
8 Apr 2026
8 Apr 2026
7 Apr 2026
7 Apr 2026
6 Apr 2026
6 Apr 2026
Henry Billingsley's 1570 English Euclid — Paper That Stands UpRead at abakcus.com (opens in a new tab)
5 Apr 2026
5 Apr 2026
18 Mar 2026
18 Mar 2026
2025
1 Dec 2025
1 Dec 2025
Undated
153 posts from abakcus.com are held, newest first (corpus.blog, measured 15 October 2026).