by Rqia May 17, 2022
Get the Sigmamug. 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.
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
Get the sigma algebramug. by childtoucherrr July 25, 2025
Get the sigma niggamug. by SIGMA Magazine August 5, 2013
Get the SIGMA Magazinemug. 
A year where an individual successfully complets:
Just jerkn't january
Fuck fapping february
Meat mastery march
Abstinence april
Must make it may!
Just jesus june
Jacked july
Almost there august
Save semen september
Only sex october
No nut november
Don't do it december
thus becoming a literal god of self control.
Just jerkn't january
Fuck fapping february
Meat mastery march
Abstinence april
Must make it may!
Just jesus june
Jacked july
Almost there august
Save semen september
Only sex october
No nut november
Don't do it december
thus becoming a literal god of self control.
Mike:"Hey, the word on the street it that you finished Sigma year. Is it true?"
James:"Yeah"
Mike:"Dude, you are a legend!"
James:"Yeah"
Mike:"Dude, you are a legend!"
by chorbet November 15, 2022
Get the Sigma yearmug. by anonymous June 2, 2024
Get the alpha sigmamug.