Xah Ep778. drunk talking about geometry of plane curves and Wolfram language

In this live stream (0:00), Xah Lee discusses the mathematics and geometry of plane curves using the Wolfram Language (0:15) while being half-drunk from drinking red wine (0:14). Throughout the video, he shows off his keyboard setup, including the Ultimate Hacking Keyboard and Nia Trackball (0:43), and mentions his Logitech G502 mouse (1:23). Main Topics Covered: Nephroid Curve and Roulettes: Xah explains how a nephroid is created by rolling a circle outside another circle of double the radius (4:27), defining it as a type of roulette (5:14). He also discusses cycloids (6:05) and the mathematical toy Spirograph (7:17), noting its use in security patterns on dollar bills (8:58). Wolfram Language Coding: He demonstrates plotting epicycloids, hypocycloids, and other variations like trocoids (10:51), running code to generate large arrays of these graphical curves (12:00). Causics and Light Reflection: The video covers caustics, specifically how parallel light rays reflecting off a circle form a cardioid (25:47, 36:12). He struggles with his live coding demonstration due to being drunk (48:01). AI and Education: Toward the end of the stream, Xah rants about how artificial intelligence is replacing the need for human teachers and interaction in technical fields (50:07). Website Issues: He mentions that his website (xahlee.info) has not been updated for a month due to hosting issues (14:37).