Blog.CarlRobitaille.org

Indiscriminate laziness

Everlasting Triangles, by u/sjpalmer94 (2021)

Posted on 2022/01/29 by Carl Robitaille

Everlasting Triangles, by u/sjpalmer94 (2021)

Mathematics, fractals, infinity.

Eternal triangles. https://t.co/ClOkOS8Y14 pic.twitter.com/fH0xW8X5Pm
— Cliff Pickover (@pickover) January 25, 2022

Discrete Differential Geometry

Posted on 2022/01/25 by Carl Robitaille

How do you compute the curvature of a polygonal curve?

The "textbook definition" gives a pretty useless answer: zero along edges; undefined at vertices!

In this #DDG2022 video we consider four alternative definitions, and explore their trade offs: https://t.co/xXIMFLXfKe pic.twitter.com/6xo3trODMu
— Keenan Crane (@keenanisalive) January 21, 2022

Norton Crypto. It’s EVEN WORSE than you think….

Posted on 2022/01/25 by Carl Robitaille

Python for Data Analysis, 3E

Posted on 2022/01/25 by Carl Robitaille

Python for Data Analysis, 3E

Exciting news: "Python for Data Analysis, 3rd Edition" is coming later this year. There is now an open access web edition at https://t.co/Ufdobfkzka. The first 6 chapters (and appendices) are available now with the rest coming soon. Thanks to @quarto_dev for making this possible!
— Wes McKinney (@wesmckinn) January 23, 2022

Play a G major chord “on guitar” using the ‘play’ command from the sox package

Posted on 2022/01/25 by Carl Robitaille

play -n synth pl G2 pl B2 pl D3 pl G3 pl D4 pl G4 delay 0 .05 .1 .15 .2 .25 remix – fade 0 4 .1 norm -1

Play a G major chord "on guitar" using the 'play' command from the sox package.
play -n synth pl G2 pl B2 pl D3 pl G3 pl D4 pl G4 delay 0 .05 .1 .15 .2 .25 remix – fade 0 4 .1 norm -1
— Command Line Magic (@climagic) January 21, 2022

Passeports vaccinaux frauduleux

Posted on 2022/01/20 by Carl Robitaille

Passeports vaccinaux frauduleux

Pas un, pas deux, mais bien des milliers de faux passeports vaccinaux ont été fabriqués par des employés du réseau de la santé d’un peu partout au Québec, selon ⁦@LP_LaPresse⁩. https://t.co/6ZIAz1tfMO
— Hadi Hassin (@hassinhadi) January 19, 2022

SQL injection protection

Posted on 2022/01/20 by Carl Robitaille

SQL injection protection 😆😂 😉😉https://t.co/GDRyghFRQX pic.twitter.com/2jb9whbgrN
— nixCraft 🐧 (@nixcraft) January 18, 2022

There’s No Rule That Says We’ll Make It

Posted on 2022/01/20 by Carl Robitaille

Use your NAS as a Steam Library – TrueNAS + iSCSI Basics

Posted on 2022/01/12 by Carl Robitaille

Surface is halfway between the edge graphs of a pair of dual 5-cells

Posted on 2022/01/12 by Carl Robitaille

pic.twitter.com/mrKZXZNmzD
— Daniel Piker (@KangarooPhysics) January 11, 2022

Yes, the surface is halfway* between the edge graphs of a pair of dual 5-cells.
*defining halfway as shortest distance to each graph being equal doesn't give a smooth surface though, so instead here I've taken where the inverse cubed distances summed over each graph are equal.
— Daniel Piker (@KangarooPhysics) January 12, 2022