# logsumexp

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logsumexp is a convexity aware implementation of $$\log(\sum_i e^{x_i})$$

### Syntax

y = logsumexp(x)


### Comment

The convex logsumexp operator can be used to perform logistic regression, as illustrated in the example in the exponential cone tutorial

### Implementation

The operator is implemented as callback operator, except when SCS or ECOS are used and the exponential cone description is exploited in a graph representation.