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некорректно поставленная задача stresses
IT	ill-posed problem
Makarov.	incorrect problem
math.	improperly posed problem; nonwell-posed problem
progr.	fuzzy task (ssn); gray task (ssn)
некорректно-поставленная задача
tech.	ill-conditioned problem; ill-defined problem; ill-posed problem
некорректно поставленная некорректная задача
math.	ill-posed problem