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The word "spectrum" confusingly has a number of unrelated meanings in various branches of mathematics.

The ordinal number of a value in a list arranged in a specified order (usually decreasing).

For a particular format in the IEEE 754-2008 framework, a subnormal number is a nonzero floating-point number with magnitude less than the magnitude of that formatÕs smallest ...

Subtraction is the operation of taking the difference d=x-y of two numbers x and y. Here, x is called the minuend, y is called the subtrahend, and the symbol between the x ...

A three-colorable graph G is a graph with chromatic number chi(G)<=3.

Let a knot K be n-embeddable. Then its tunnel number is a knot invariant which is related to n.

The number 1. There are n nth roots of unity, known as the de Moivre numbers.

The quantity twelve (12) is sometimes known as a dozen. It is in turn one twelfth of a gross. Base-12 is known as duodecimal. The Schoolhouse Rock segment "Little Twelvetoes" ...

Bit rate (i.e., bits per second, abbreviated bps) is a measure of the number of data bits (digital 0s and 1s) transmitted each second in a digital communications channel. If ...

The chromatic invariant theta(G) of a connected graph G is the number of spanning trees of G that have internal activity 1 and external activity 0. For graphs other than the ...