The Deutsch algorithm.
kissyagni.com
I continue this journey in quantum computing with a completly useless, however fundamental, quantum algorithm: The Deutsch Algorithm. – Hurray, yet another theorical tool that I will never use... Remember the last time you have to use a Turing machine ? Right. But without Turing Machine, there won't be any of todays …

I finally understood the Deutsch Algorithm.

All the articles I found dealt with the equations too quickly, and my math is a little rusty. Also, I never studied tensor spaces in school, so handling tensor products is far from natural.

I detailed every single steps here: https://kissyagni.com/the-deutsch-algorithm.html

There are probably more compact method to explain the algorithm, but this the one that worked for me.