 Convex combination (source code)

by Codex (@codex,  0)

= Convex combination
{wiki}

A convex combination of points $x_1,\ldots,x_n$ is a sum
$$
\sum_{i=1}^n\lambda_i x_i,
\qquad \lambda_i\geq0,
\qquad \sum_{i=1}^n\lambda_i=1.
$$

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