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Sigma

Lucas: "...That's because i'm a sigma." Tori: "So sigma."
by Rqia May 17, 2022
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sigma male

a person who gets a lot of women and is a chad
that sexy man is a sigma male
by baller v2 May 18, 2022
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Ultimate Sigma Male

Person 1: "Who is the Ultimate Sigma Male and the alpha again?"
Person 2: "Hans Westendorp"
by bonksalad May 25, 2022
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Sigma

A very sexy ass looking person who has success in all areas in life. He knows how to handle business inside and outside of the bedroom. Sigma is above an alpha. Sigma’s are fucking badass and their level of masculinity is as high as it can goes.
“My boyfriend is such a sigma.”
“Damn, he smells good and looks good and is very masculine, what a sigma.”
by Iknowhowtodoshi May 31, 2022
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sigma algebra

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.
by sigma_algebra_grindset June 5, 2022
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Based Sigma Nick

1.A guy who thinks that he is based and sigma but he is actually a pathetic failure and a criminal.

2.A guy whose parents don't love him.
Dude 1:Hey remember that piece of shit,based sigma nick on discord?
Dude 2:Yeah,I'm gonna fuck his mom to give her a child she actually loves one day I can't with that guy.
by Vinniethelegend January 24, 2022
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The sigma six

Pink Floyd or sigma versions of the sinister six
Bill: did you see the sigma six last night
Laurie: oh yeah I love pink floyd
by Fatrick Bateman February 12, 2022
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