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& availability of various grades. text / reference books . hand book of plastic materials & technology, rubin irwin j . plastics materials, brydson, j.a . plastics materials & processes , schwartz & goodman . text book of polymer science, fred w billmeyer . polymer science v.r. gowariker . principles...
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origin (all variables equal to ) must be a feasible point. this condition is satisfied only when all the constraints (except non-negativity) are less-than constraints and with a positive constant on the right-hand side. the big m method introduces surplus and artificial variables to convert all inequalities...