(algebraic topology) The image of the (k + 1)ᵗʰ boundary homomorphism (for a given chain complex).

(algebraic topology) The kernel of the kᵗʰ boundary homomorphism (of a given chain complex).

Synonym of Dakota Formation

A social group that advocates and practices hate speech and/or hate crimes.

A musical group specializing in pop music.

A pop group made up of (usually attractive) young women.

(US, Canada) A collection of residents representing a geographic or otherwise connected residential or business area who together ensure that their communities development interests are known, represented and supported.

(topology) Any group that is a smooth manifold and whose group operations are differentiable.

(chemistry) In the periodic table of the elements, any of the eight groups (columns) of elements that contain the lightest (and most common) elements.

A group of people who informally support each other over a problem which all members share.