Symmetric tensor
From Wikipedia, the free encyclopedia.

A tensor A of components A_ij is said to be symmetric if

A_ij=A_ji

for all i,j.

A tensor is a certain kind of geometrical entity which generalizes the concepts of scalar, vector and linear operator. Tensors are of importance in differential geometry, physics and engineering. Einstein's theory of general relativity is formulated completely in the language of tensors.

The original article can be found at: http://en.wikipedia.org/wiki/Symmetric_tensor.
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