One of the mysteries of the English language finally explained.
Multiply (a vector, matrix, or element of a group) non-commutatively by a following factor.
- ‘To test trait-specific effects, we need to introduce another matrix, T, which is used to postmultiply matrix B.’
- ‘Similarly, postmultiplying Y by a J matrix creates a 6x3 matrix of row sums of Y (where each column is just a repeat of the same six row sums).’
- ‘Given an n x n matrix A, it is always possible to find an n-element vector which postmultiplies A and gives an all zero result.’
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