EliminatePwl canonicalizer for the cumulative sum atom

EliminatePwl.cumsum_canon(expr, args)

## Arguments

expr

An Expression object

args

A list of Constraint objects

## Value

A canonicalization of the piecewise-lienar atom constructed from a cumulative sum atom where the objective is Y that is of the same dimension as the matrix of the expression and the constraints consist of various row constraints