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[HELP-GLPK]about the presolver

From: bo liu
Subject: [HELP-GLPK]about the presolver
Date: Tue, 2 Jun 2009 12:05:05 +0800

hello everyone,
from the glpk.pdf i know that Presolving is an optional feature of the routine glp_simplex, and by default it is disabled. but when i use glpsol.exe to solve LP problem presolving is enabled by default ,right?(because when i solve some problem it gave me some messages like "if you need actual output for non-optimal solution, use --nopresol")
when i  use glp_simplex through the API only, if the problem have no optimal solution(a computed solution is infeasible or non-optimal,), it also can give me a result just like using "--nopresol" in the glpsol.exe  ,right?
thanks in advance !


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