Definition of weights in a linear combination of vectors

Created almost 9 years ago, updated about 8 hours ago

The weights of a linear combination $\sum_i c_iv_i$ are its scalar coefficients $c_i$. In $2u-3v$, the weights are $2$ and $-3$. They need not be probabilities or sum to one. When the vectors form a basis, the weights are the coordinates of the resulting vector in that basis.

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