unbounded objective in sos program

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Eike F

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Jun 1, 2015, 9:36:36 AM6/1/15
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Hello!

I'm want to find out, whether a certain polynomial in 4 variables is SOS or not:

solvesos(sos(mypolynomial))

Yet the solver says that the objective is unbounded (I'm using sedumi).

My question is this: What is this objective function and do you have hints how I could rework my problem in order to solve it. I guess that the problem might stem from the fact that the coefficients of the polynomial range over 15 orders of magnitude.

Best

Johan Löfberg

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Jun 1, 2015, 9:42:12 AM6/1/15
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YALMIP dualizes back and forth, so this means it is infeasible (no sense in being unbounded as you don't optimize anything)

15 orders of magnitude is a quick way to disaster.
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