# Mathspp Blog

342 391,958 32,910
articles words lines of code
##### TIL #038 – look-and-say sequence growth

Today I learned that the length of the terms of the “look-and-say” sequence has a well-defined growth rate.

##### Problem #057 – how to find the circle centre

Can you find the centre of the circle with just five lines?

##### TIL #034 – multi-channel transposed convolution

Today I learned about multi-channel transposed convolutions.

##### TIL #033 – transposed convolution

Today I learned about the transposed convolution transformation in CNNs.

##### Problem #056 – tennis tournament

How many matches does it take to find the winner of a tennis tournament?

##### TIL #032 – t-SNE for dimensionality reduction

Today I learned about t-SNE for dimensionality reduction.

##### Problem #055 – horse racing

25 horses racing, and you have to find out the fastest ones!

The Zen of Python says “there should be one -- and preferably only one -- obvious way to do it”, but what if there's a dozen obvious ways to do it?

##### Elo rating system simulation

Join me as I create a simulation that tries to test an Elo-based rating system for quizzes.

##### Problem #054 – imperfect compression

Can you show that perfect compression is impossible?

##### TIL #021 – Spouge's formula

Today I learned about Spouge's formula to approximate the factorial.

##### Problem #053 – weighing the odd one out

Can you find the fake ball by weighing it?

##### Problem #052 – chessboard domino

Can you tile a chessboard with two missing squares?

##### Problem #051 – queens and knights

How many queens and knights can you place on a chessboard?

##### Problem #050 – 8 queens

In how many ways can you place 8 queens on a chessboard?

##### TIL #017 – symmetrical indexing with bitwise inversion

Today I learned about the symmetry in indexing from the beginning and end of a list with the bitwise invert operator.