Numerical analysis of improper linear programs using the delta-plan-es interactive system

A linear program is said to be improper if its feasible set is empty or its optimal value is infinite. Improper programs appear as the result of inaccurate information, excessive simplification, considering some restrictions as unchangeable, etc. Moreover, a contradictory model may fit the real contradictions adequately, and the ways of transforming it into a noncontradictory one (the ways of correcting it) may correspond to real procedures for solving these contradictions. The paper describes the DELTA-PLAN-ES interactive system for numerical analysis of improper linear programs. The system is designed for Rjad-2 ES computers.