If two graphs have the same number of nodes and the set of degrees of the nodes are equal for both graphs then they are isomorphic.

If two graphs are isomorphic then every node has the same degree.

There are adjacency matrices which are not square.

Given the adjacency matrix for a graph it is possible to write that graph as set of vertices and a set of edges.

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The direction of the cross product of two non-zero and distinct vectors is the identical to that of the cross product of the same two vectors in opposite order.

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