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appsi_highs: allow solving quadratic problems #3431

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appsi_highs: allow solving quadratic problems #3431

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464a8ad
appsi_highs: allow solving quadratic problems
maurerle Nov 19, 2024
db26d33
add highs to qcp_solver tests
maurerle Nov 20, 2024
bee8ee9
try adding quadraticCoefficient
maurerle Nov 20, 2024
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12 changes: 2 additions & 10 deletions pyomo/contrib/appsi/solvers/highs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -397,12 +397,8 @@ def _add_constraints(self, cons: List[ConstraintData]):

for con in cons:
repn = generate_standard_repn(
con.body, quadratic=False, compute_values=False
con.body, quadratic=True, compute_values=False
)
if repn.nonlinear_expr is not None:
raise DegreeError(
f'Highs interface does not support expressions of degree {repn.polynomial_degree()}'
)

starts.append(len(coef_values))
for ndx, coef in enumerate(repn.linear_coefs):
Expand Down Expand Up @@ -589,12 +585,8 @@ def _set_objective(self, obj):
)

repn = generate_standard_repn(
obj.expr, quadratic=False, compute_values=False
obj.expr, quadratic=True, compute_values=False
)
if repn.nonlinear_expr is not None:
raise DegreeError(
f'Highs interface does not support expressions of degree {repn.polynomial_degree()}'
)

for coef, v in zip(repn.linear_coefs, repn.linear_vars):
v_id = id(v)
Expand Down