We shall assume that the reader is familiar with the rudiments of linear algebra. In particular, he should be acquainted with the notion of a linear space, or vector space, and the elementary concepts associated with linear spaces. In this chapter we review these ideas, largely to fix terminology and notation. Readers wishing to improve their acquaintance with any part of linear algebra, or to pursue in greater depth any of the topics discussed below, might consult . Another excellent source is .
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