A study on sorting times

As I said in a previous post, I worked on some research papers on cryptography and algorithms. I decided to publish, for now, one of the papers: “A study on sorting times”.

You can read/download it from here [romanian language].

Modulus, a simple demonstration

I write this paper in order to prove an equation. Why? Because today, in a national maths contest, I received an exercise that could have been solved using this equation.

We know that a modular expression looks like this: a≡b(mod n) , and it is read: “a is congruent to b modulo n”.

I must prove the following: P(k): (∑αi mod 2) mod 2=(∑αi) mod 2 where 1≤i≤k

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