# How to minimize matrix function in MathCAD?

I'm new to mathcad and i'm experiencing problems with using it. I need to minimize my function Trr(Rr), where Rr is matrix with given constraints, Trr returns sum of its elements

Here's what i do:

MathCAD says

Variable is not determined

What am i missing? I'm stuck here :(

Thanks in advance, Ilya

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## 1 Answer

you just wrote one of conditions twice.

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