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Another word for a C^infty (infinitely differentiable) manifold, also called a differentiable manifold. A smooth manifold is a topological manifold together with its ...

A dozen dozen, also called a gross. 144 is a square number and a sum-product number.

Every finite-dimensional Lie algebra of characteristic p=0 has a faithful finite-dimensional representation.

Also known as the Leibniz criterion. An alternating series converges if a_1>=a_2>=... and lim_(k->infty)a_k=0.

An expression is said to be ambiguous (or poorly defined) if its definition does not assign it a unique interpretation or value. An expression which is not ambiguous is said ...

An antimagic graph is a graph with e graph edges labeled with distinct elements {1,2,...,e} so that the sum of the graph edge labels at each graph vertex differ.

A mathematical relationship relating f(x+y) to f(x) and f(y).

A pair of numbers m and n such that sigma(m)=sigma(n)=m+n-1, where sigma(m) is the divisor function. Beck and Najar (1977) found 11 augmented amicable pairs.

All curves of constant width of width w have the same perimeter piw.

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