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Vectors, Pure and Applied by T. W. Körner

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12

Polynomials in images(U, U)

12.1 Direct sums

In this section we develop some of the ideas from Section 5.4 which the reader may wish to reread. We start with some useful definitions.

Definition 12.1.1 Let U be a vector space over images with subspaces Uj [1 ≤ jm].

(i) We say that U is the sum of the subspaces Uj and write

images

if

images

(ii) We say that U is the direct ...

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