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1. Background and issues
Bold uppercase letters are used to designate matrices, e.g.X; bold lowercase letters designate column vectors, e.g. x j designates the j e column ofX (vectors are always assumed to be arranged in columns); bold lowercase letters designate scalars, e.g. matrix elements x ij or indices i. Where necessary, the dimension of matrices can be indicated by a double indication in brackets, e.g.X (np ) indicates that the matrixX has n rows and p columns. The scalar product of two vectorsa andb is denoted bya T b. Quantities are indicated by a capital italic letter, e.g. temperature T. In the remainder of this article, the quantity...
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The Ultimate Scientific and Technical Reference