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A sigma algebra (or σ-algebra) is to set algebras what sigma males are to males. The Borel hierarchy (the analog of the male hierarchy) is not a σ-algebra at any countable rank; instead the σ-algebra has the largest possible rank -- ω_1, the least uncountable ordinal (under suitable conditions e.g. the Polish space is uncountable. This is known as the non-collapse of the Borel hierarchy).
A σ-algebra is closed under countable union, countable intersection, and relative complement. This means σ-algebras arise naturally in the study of measure theory, where the measurable sets form a σ-algebra.
The algebra of Lebesgue-measurable subsets of R (i.e. the sets of real numbers with a well-defined "length", which is possibly infinity) form a sigma algebra.
A based Ohio skibiti toilet Sigma McLigma
X: I hate gay people y: what a absolute Sigma McLigma
"Sigma sigma boy" is a brainrot term used by many brainrot content creators to farm views, likes and subscribers from Generation Alpha. The term became popular when Russian artists Betsy & Maria Yankovskaya released a song called "Сигма Бой" (Sigma Boy).
"Sigma sigma boy, sigma boy, sigma boy
Kazhdaya devchonka khochet tantsevat' s toboy"
some random ass russian song that sounds like it's saying "sigma sigma boy" its been associated on "brainrot" memes
hawk 1: bro i got 0% fluffy hair 💀💀
hawk 2: uhhhh sigma sigma boy sigma boy
is it super sigma Ohio skibidi toilet tv women mewing
a racist meme page run by a horny Patrick Bateman kinnie, focusing on posting memes to trigger reactions, for his entertainment
Has issues with women, refers to them as w*men. Also denies that Irish people are real.
Potential flat earther.
“Keep seeing theses awful homophobic and racist memes on my feed”
“Oh let me guess, you follow sigma army”
You could possibly encounter one o these moggers at kai cenat's house. They give out maximum amounts of YouTube shorts brainrot
"That is so sigma griddy fortnite! I sure hope that this is poggers rn! "