O math, my true love, how i have alienated thee, and you being quite difficult. 2026-04-26T20:48:26-07:00 Xah Lee http://xahlee.info/ http://xahlee.info/math/blog.html http://xahlee.info/favicon.svg © 2026, Xah Lee urn:uuid:2cf3c5f2-df35-47b9-8252-261901d257f4 2026-04-26T20:48:26-07:00

2026-04-26

• Helicoid-Catenoid
• Catenoid
• Breather Surface (parametric formula)
• Henneberg Surface

• Cross-Cap Surface
• Boy's Surface (Apery)
• Boy's Surface (Bryant-Kusner)
• Steiner Surface

• Deco-Cube
• Ellipsoid
• Barth Sextic

urn:uuid:09d61ec9-b626-45f6-a701-69d45b7c72e9 2026-04-26T20:47:26-07:00

2026-04-22

• Big O() Notation is Abuse of Notation (2026)

urn:uuid:94894f1e-1199-47bd-b3c8-d0c778c684c1 2026-04-17T18:38:07-07:00

2026-04-17

• Geometry: First Fundamental Form

urn:uuid:932e7a52-2721-4e89-beb6-f398917a7636 2026-02-28T12:23:55-08:00

2026-02-16

• Xah Talk Show 2026-02-15 Ep760. intro to classical piano music, lambda calculus, math foundation, set theory, category, homotopy type theory