The identity matrix of size is an square matrix where all of the values in its main diagonal are ones and all other values are zeroes. Alternatively, an identity matrix is a square diagonal matrix whose diagonal is one in every position. For example, the identity matrix of size 3 is The identity matrix of size is the identity element of all invertible matrices of size . File:Linear subspaces with shading.svg This linear algebra-related article contains minimal information concerning its topic. You can help the Mathematics Wikia by adding to it.
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