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Special Features for Mathematical Programs:

https://www.gams.com/latest/docs/UG_Lan ... tures.html

## Search found 8 matches

- 1 week ago
- Forum: Syntax
- Topic: commercial diameter - declare
- Replies:
**1** - Views:
**120**

- 3 weeks ago
- Forum: Syntax
- Topic: problem with syntax of the equation
- Replies:
**12** - Views:
**458**

### Re: problem with syntax of the equation

I'd like to know if GAMS undestand this situation ... n nodes / n1 * n48 / a(n,n) /..../; .... alias(n,np,i,j); ... q(n) - scalar q(a) - variable ... eq1(a(i,j)).. q(a(n,np)) =e= sum(q(a(n,np)$(np=i)) + q(n) GAMS understand : eq(i) eq(i,j) but GAMS undestand: eq(a(i,j)) ??? my objective is to elabo...

- 3 weeks ago
- Forum: Syntax
- Topic: problem with syntax of the equation
- Replies:
**12** - Views:
**458**

### Re: problem with syntax of the equation

GAMS understand :

**eq(i)..**

eq(i,j)..

eq(i,j)..

but GAMS undestand:

**eq(a(i,j))..**???

- 3 weeks ago
- Forum: Syntax
- Topic: problem with syntax of the equation
- Replies:
**12** - Views:
**458**

### Re: problem with syntax of the equation

I'd like to know if GAMS undestand this situation ... n nodes / n1 * n48 / a(n,n) /..../; .... alias(n,np,i,j); ... q(n) - scalar q(a) - variable ... eq1(a(i,j)).. q(a(n,np)) =e= sum(q(a(n,np)$(np=i)) + q(n) GAMS undestand eq(i) and eq(i,j) but GAMS undestand eq(a(i,j)) ??

- 3 weeks ago
- Forum: Syntax
- Topic: problem with syntax of the equation
- Replies:
**12** - Views:
**458**

### Re: problem with syntax of the equation

I'd like to know if GAMS undestand this situation ... n nodes / n1 * n48 / a(n,n) /..../; .... alias(n,np,i,j); ... q(n) - scalar q(a) - variable ... eq1(a(i,j)).. q(a(n,np)) =e= sum(q(a(n,np)$(np=i)) + q(n) GAMS understand : eq(i) eq(i,j) but GAMS undestand: eq(a(i,j)) ??? my objective is to elabor...

- 1 month ago
- Forum: Syntax
- Topic: commercial diameter - declare
- Replies:
**1** - Views:
**120**

### commercial diameter - declare

Hi, I have a problem where I have to calculate the diameter of a pipe, using the equations I will find the diameter value that is a decimal number. But the diameter I will use is the commercial value, always selecting the next commercial size of the value found by the equations. Then I must analyze ...

- 1 month ago
- Forum: Syntax
- Topic: problem with syntax of the equation
- Replies:
**12** - Views:
**458**

### Re: problem with syntax of the equation

Thanks a lot.

- 1 month ago
- Forum: Syntax
- Topic: problem with syntax of the equation
- Replies:
**12** - Views:
**458**

### problem with syntax of the equation

I'm new with optimization and GAMS. I not sure how to declare the Manning equation. This equation describe the flow dynamic on free flow condition, considering geometry and viscosity. I declared scalar and variables as: man manning coef / 1.30e-2 / q(n,n) flow (m**3 per s) ir(n,n) inclination (m per...