A group $latex G$ in the context of math is a simple algebraic structure with a product operation $latex *$. Naturally, the operator won’t be of much use if the structure is not closed under the operation. Namely, we would like to have $latex a * b$ also in $latex G$ if both elements $latex…
Lagrange’s theorem, Euler’s theorem, Fermat’s little theorem, and a short introduction to groups
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