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An edge-induced subgraph is a subset of the edges of a graph G together with any vertices that are their endpoints. The subgraph induced by a set of edges can be computed in ...

sum_(i=1)^n((partialu)/(partialx_i))^2=1.

Ein(z) = int_0^z((1-e^(-t))dt)/t (1) = E_1(z)+lnz+gamma, (2) where gamma is the Euler-Mascheroni constant and E_1 is the En-function with n=1.

A positive-height (outward-pointing) pyramid used in augmentation. The term was introduced by B. Grünbaum.

A space endowed with a non-Euclidean elliptic geometry.

Johnson solid J_(20).

Johnson solid J_(40).

Johnson solid J_9.

Johnson solid J_(18).

Johnson solid J_7.