1. Production set Input requirement set All y in y are negative, let them be -x(then x is positive), and the rest yi to be q S0,x∈界andq∈9,andy=(q,x)∈9 the input requirement set is T(q)={X∈界:(q,-x)eY} lecture 1 for Chu Kechen Honors Collegelecture 1 for Chu Kechen Honors College 1. Production set • Input requirement set: – All yi in y are negative, let them be –x (then x is positive), and the rest yj to be q . – So, and , and – the input requirement set is : I + x O q+ ( ) n = + y q, -x ( ) { : ( , ) } I V q x q x Y =  −  +