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hdavid16 / DisjunctiveProgramming.jl

A JuMP extension for Generalized Disjunctive Programming
MIT License
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Need to support multiple disjunctions #29

Closed hdavid16 closed 2 years ago

hdavid16 commented 2 years ago

Binary variables can be modelled as a Matrix of binaries (2 indices: 1st index is the number of disjuncts, 2nd index is the number of disjunctions). A SparseAxisArray might be better suited for this since not all disjunctions have the same number of disjuncts.

hdavid16 commented 2 years ago

An easier alternative is to have disjunction specific disaggregation: tag the disjunction name to the disaggregated variables (check they don't already exist). This way you don't need to know the number of disjunctions before hand. Keep a record of the names of each disjunction that is added to ensure no duplicates.

This brings up another issue: constraints can't be used in more than one disjunction. Need to enforce this by keeping track of already reformulated constraints. However, you could use a reformulated constraint in a parent disjunct. So maybe a warning should be thrown stating the actual constraint that is being reformulated?