[HELP-GLPK]about the presolver

[bo liu]

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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LEO