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dirty sigma

To be a rude and bad “sigma” you must be in violation of some sort of order and considered a dirty sigma.

The term was invented by an 8th grader in Kentucky who called one a dirty sigma. The other term, muddy sigma is mainly used for pointing out unlawful conduct, in which was invented by the same person.

The words “Dirty sigma” can be traced back as far as 2021-2022 as a user on Reddit made a post about Dirty Sigmas lenses, in referral to the brand Sigma.
Dave is a dirty sigma for not being on time for class.
by greengalaxio January 7, 2024
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erm what the sigma

A way to express shock for the brainrotted
by Tutamaster June 5, 2024
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what the sigma

The Gen Alpha way of saying “what the hell” but can be used as a reaction to what someone says.
Gary: Oh yeah you heard that Alice has a new boyfriend. Her boyfriend’s got Down syndrome.
Harry: What the sigma
by Harryshanker1999 May 24, 2024
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Erm what the sigma

Symptom of brainrot

Originated from a TikTok in March 5th, 2024
by Aegilops123 April 14, 2024
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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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SIGMA Magazine

SIGMA Magazine is an online arts, culture and lifestyle magazine
by SIGMA Magazine August 5, 2013
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