Recent content by robphy

https://www.quantamagazine.org/how-terry-tao-became-an-evangelist-for-ai-in-math-20260608/

This thread is about Special Relativity, where the field equations are not treated. For an introduction to Special Relativity, I would not recommend Penrose. Hyperbolic-geometry (a curved 3-D space) occurs in certain subspaces (like the space of 4-velocities) in flat 4D-Minkowski spacetime...

Rush - Tom Sawyer - 50 Something Tour - Opening Night LA KIA Forum RUSH - YYZ - Kia Forum - 6-7-26 - Inglewood Los Angeles RUSH - THE SPIRIT OF RADIO - Kia Forum - 6-7-26 - Inglewood Los Angeles Rush @ Kia forum Inglewood California 6/7/26 set 1 Rush @ Kia Forum Inglewood California...

Note: special-relativity is hyperbolic-trigonometry in flat Minkowski spacetime (not curved hyperbolic geometry, unless you are talking about the velocity-space or the mass-shell). Euclidean geometry is circular-trigonometry in flat Euclidean space (not curved spherical geometry, unless you are...

The quantity it represents is important, but not necessarily expressed in terms of the spatial velocity ##v##. Indeed, $$\gamma=\frac{1}{\sqrt{1-(v/c)^2}}=\cosh\theta,$$ where ##\theta## is the rapidity (the Minkowski-analogue of the angle between two vectors)... and...

Possibly enlightening: Differential equations, a tourist's guide | DE1 3Blue1Brown

(June 2026) Jamming in Guiyang with my bro @maituoguitarlujunxi Couldn’t be happier! justincaterina YouTube short: All right! I m done！😩😩😩🤣🤣 - justincaterina

MaituoGuitar - "Hi guys, this is my guitar channel, first of all, let me introduce myself, my name is: Maituo / Chinese name: Lv Junxi, I was born on March 8, 2015, I am from Guiyang, Guizhou, China, in 2020 I started to learn classical guitar. In January 2021, I started to learn electric...

In addition, what is also overlooked is that those events are still causally ordered. For two null-related events, one event is in the future of the other.

(2020) Al Di Meola talks about Matteo Mancuso (2020) Joe Bonamassa talks about Matteo Mancuso - (2024) Joe Bonamassa & Matteo Mancuso - Breaking Up Somebody's Home - Berlin am 18.04.2024 - go to 3m15s (2023) Eric Johnson talks about Matteo Mancuso (2020) Steve Vai talks about Matteo...

(2022) Al Di Meola & Matteo Mancuso - live @ Eddie Lang Jazz Festival 2022 - Monterodu (2026) Are There Any Guitarists Better Than Matteo Mancuso? - Rick Beato More Mancuso from the covers thread

Philomena Cunk is great because her character is like the host of a documentary. By contrast, there was Ali G (another character of Sacha Baron Cohen, in addition to Borat) (and in honor of the upcoming NBA finals: Ali G Interviews NBA Stars (full) )

Possibly useful: https://www.ocf.berkeley.edu/~abhishek/chicphys.htm https://webspace.science.uu.nl/~hooft101/theorist.html