Definition:Sigma-Algebra

Also known as
This is also seen as $\sigma$-algebra, from $\sigma$ being the Greek letter sigma.

Also see

 * Equivalence of Definitions of Sigma-Algebra
 * $\sigma$-Algebra as Magma of Sets, proving that $\sigma$-algebras instantiate the general concept of a magma of sets.


 * Sigma-Algebra is Delta-Algebra
 * Delta-Algebra is Sigma-Algebra

Linguistic Note
The $\sigma$ in $\sigma$-algebra is the Greek letter sigma which equates to the letter s.

$\sigma$ stands for for somme, which is French for union.