This is a a Poker game I invented that I tentatively name it “Gotcha”. Prepare a set of Pokers, and discard the jokers. In this game we treat A as 1, J as 11, Q as 12 and K as 13. The suites do not matter in this game. The goal is to guess the …
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Tug-of-War
Today I was scrolling my phone and procrastinating as usual. I watched some tug-of-war videos and was very amazed by how people are addicted to this seemingly childish game (me included). I wondered, why would they bend their body so low that their bottoms almost touched the ground? Then the boring physicist inside me woke …
Translations, rotation, and a very special type of graph
Disclaimer: the blog is motivated from a mathematics point of view. I apologise for my lack of computer graphic knowledge and please point it out if you spot anything suspicious. I. Rotations and translations Rotations in real life are everywhere. You may constantly rotate a pen between your fingers. Or a fidget. Or a magical …
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C-Theorems
Principal Bundles and gauge theory
Imagine a 2D plane. Instead of the usual Cartesian or polar coordinates, we can use a different point of view: for each point, we can start from the x axis and move in the y direction. Also, we can start from (x,sin x) and move in the y direction. If we regard the first label …