AMPL code to GAMS

GAMS
1

Dear friends,

How can I transform the “complement” function of AMPL to GAMS. Following are the two examples.

c2{k in K}: 12 >= 2x[1,k] + 3x[2,k] complements y[2,k] >= 0;

KKT2{k in K}: w[2,k]*exp( x[2,k] ) - y[1,k]*3 + y[2,k]*3
complements 0 <= x[2,k] <= 2;

Thanks a lot,
Ozdalga

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2

Ozdalga,

Complementarity in GAMS is indicated by a “dotted pair” in the model statement, e.g.

model m / f.x, g.y /;

There are lots of MCP models in the GAMS model library, and the PATH solver manual covers the basics.

-Steve


On Thu, Apr 24, 2014 at 3:36 PM, jozdalga wrote:

Dear friends,

How can I transform the “complement” function of AMPL to GAMS. Following are the two examples.

c2{k in K}: 12 >= 2x[1,k] + 3x[2,k] complements y[2,k] >= 0;

KKT2{k in K}: w[2,k]*exp( x[2,k] ) - y[1,k]*3 + y[2,k]*3
complements 0 <= x[2,k] <= 2;

Thanks a lot,
Ozdalga

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Steven Dirkse, Ph.D.
GAMS Development Corp., Washington DC
Voice: (202)342-0180 Fax: (202)342-0181
sdirkse@gams.com
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