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rm lu

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2023-03-04 12:15:48 -08:00
parent 97c1ba4641
commit a38be43264
5 changed files with 11 additions and 74 deletions
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19
src/math/lp/lar_solver.cpp
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@ -45,7 +45,7 @@ namespace lp {
delete t;
}
bool lar_solver::use_lu() const { return m_settings.simplex_strategy() == simplex_strategy_enum::lu; }
bool lar_solver::use_lu() const { return false; }
bool lar_solver::sizes_are_correct() const {
lp_assert(strategy_is_undecided() || !m_mpq_lar_core_solver.need_to_presolve_with_double_solver() || A_r().column_count() == A_d().column_count());
@ -478,10 +478,7 @@ namespace lp {
m_mpq_lar_core_solver.m_r_solver.set_status(lp_status::OPTIMAL);
return ret;
case simplex_strategy_enum::lu:
lp_assert(false); // not implemented
return false;
default:
lp_unreachable(); // wrong mode
}
@ -1999,20 +1996,14 @@ namespace lp {
void lar_solver::decide_on_strategy_and_adjust_initial_state() {
lp_assert(strategy_is_undecided());
if (m_columns_to_ul_pairs.size() > m_settings.column_number_threshold_for_using_lu_in_lar_solver) {
m_settings.set_simplex_strategy(simplex_strategy_enum::lu);
}
else {
m_settings.set_simplex_strategy(simplex_strategy_enum::tableau_rows); // todo: when to switch to tableau_costs?
}
m_settings.set_simplex_strategy(simplex_strategy_enum::tableau_rows); // todo: when to switch to tableau_costs?
adjust_initial_state();
}
void lar_solver::adjust_initial_state() {
switch (m_settings.simplex_strategy()) {
case simplex_strategy_enum::lu:
adjust_initial_state_for_lu();
break;
case simplex_strategy_enum::tableau_rows:
adjust_initial_state_for_tableau_rows();
break;