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The axiom of Zermelo-Fraenkel set theory which asserts the existence for any set a of the sum (union) x of all sets that are elements of a. The axiom may be stated ...

The backslash symbol \ is used to denote a set difference, quotient group, or integer division.

When working over a collection of fields, the base field is the intersection of the fields in the collection, i.e., the field contained in all other fields.

A set of values of similar meaning obtained in any manner.

One baud is defined as the state of a signal in a communication channel changing once per second.

A construction for the rhombic dodecahedron.

A knot used to join the ends of two ropes together to form a longer length.

A transformation which is one-to-one and a surjection (i.e., "onto").

A two-sided (doubly infinite) Laplace transform, L_t[f(t)](s)=int_(-infty)^inftyf(t)e^(-st)dt. While some authors use this as the primary definition of "the" Laplace ...

Johnson solid J_(91).