Dimension Theorem For Vector Spaces - Kernel Extension Theorem For Vector Spaces

Kernel Extension Theorem For Vector Spaces

This application of the dimension theorem is sometimes itself called the dimension theorem. Let

T: UV

be a linear transformation. Then

dim(range(T)) + dim(kernel(T)) = dim(U),

that is, the dimension of U is equal to the dimension of the transformation's range plus the dimension of the kernel. See rank-nullity theorem for a fuller discussion.

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