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The regular elo formula is complicated.

The most basic elo formula is win = 1 points, draw = 0, lose = -1. Which is a little too basic.

I looked around and couldn't find a 'medium difficulty' elo formula. Anyone have a medium difficulty proposal?

Regular elo formula:

The Elo rating system embodies this by using a formula that changes a player's rating by adding K(S-E) to his rating each time. K is a constant that is the same for all players; the higher it is, the more easily your rating changes. S is the score of the player in a match (+1 for a win, 0 for a loss). E is the expected score of the player in the match. Against a weak player, it is close to 1 since you expect a strong player to beat a weak player most of the time. Conversely, against a stronger player, it is close to 0. You can calculate E using the formula E_A = 1/(1+10(R_B-R_A/400)), where E_A is the expect score of player A with rating R_A when faced with player B with rating R_B.

Beginner-friendly derivation of an alternative expression of the gamma function.

Walk around a house that exists in a non-Euclidean space called a 3-sphere.

A math channel by a Field's Medalist having really good explainations of undergrad and grad topics.

Since the spaces feature for matrix has entered open beta, I've created a mathematics space that brings together (most) of the mathematics related rooms on matrix.org.

I was burned out on math for a very long while after failing out of my phd, just now starting to get back into it. This paper is not something a professional mathematician would take seriously, but I'm really happy with it still and wanted to share.