hi there

my problem:

SETS

i , j ;

SCALAR Q;

PARAMETERS A(i);

PARAMETERS val(j);

val(j) = ord(j);

VARIABLES

X(i) , T, Z ;

INTEGER VARIABLE X;

POSITIVE VARIABLE T;

EQUATIONS COST;

COST … Z =E= Q/T + SUM(i, SUM((j$(val(j) le X(i)), (X(i) - val(j)) * exp(-A(i)*T))) ;

MODEL TRANSPORT /ALL/ ;

SOLVE TRANSPORT USING MINLP MINIMIZING Z ;

Guys, is it possible to do summation with condition on variable

## %% in LaTeX

\sum_{j = 0}^{X_i} (X_i - j)*exp(-A_i*T)

%%%%%%%%

X_i is variable??

thank you

\

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