New posts in Integers

I don't understand this definition of the integers.

Convert a piecewise linear non-convex function into a linear optimisation problem.

$\frac{2abc}{(a+b-c)(b+c-a)(c+a-b)}$ a positive integer

Minimum sum of the squares

Find the limit $\lim_{n\to\infty}\left(\sqrt{n^2+n+1}-\left\lfloor\sqrt{n^2+n+1}\right\rfloor\right)$

Prove that the number 14641 is the fourth power of an integer in any base greater than 6?

Find three real orthogonal matrices of order $3$ having all integer entries.

How to prove $\frac xy + \frac yx \ge 2$

Why is the set of integers with the operation of addition considered a cyclic group?

What is the difference between natural numbers and positive integers?