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Questions tagged [picos-api]

PICOS is a user friendly Python API to several conic and integer programming solvers.

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Specify the developement version of a python module

I want to add a new class to PICOS, a python module. I installed it the normal way a long time ago. But now I have downloaded the source and I a am trying to make some changes. The problem is that I cannot manage to ask python to load the module…
Paul Fournel
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PICOS library python

I am trying to multiply two matrices, in one I have a multidimensional values of sixe (96, 96, 2, 1) and I am trying to multiply it with an array of PICOS variables, it is possible to do this?? because the error that I have is:…
eldanks
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equivalent export function in yalmip matlab into picos python

As I said, I am looking for the equivalent function into the library PICOS in python of the function export() from yalmip in matlab. Or how can I extract the matrices in normalised linear matrix form from an optimisation problem already written in…
eldanks
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Using multiprocessing to call instances of a class method from another class

I need to use a multiprocessing technique in a class that call a method of another class. Below the explanation. I am coding a multi-agent strategy. So, my code is structured in 3 classes: agent class environment class main. In the agent class, I…
Chaimaa
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How to build a Picos affine expression?

I am using picos as a LP modeling language. However, I got the following inconsistency: import picos as pic prob_tmp = pic.Problem() a_tmp = prob_tmp.add_variable("a",1) eta_tmp = pic.new_param("eta",0.0341) print (1-eta_tmp) * a_tmp print a_tmp -…
user40780
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Cannot impose a constraint of positive semi-definiteness on a matrix variable in PICOS optimization

I am trying to solve the following semi-definite program using Picos package. In fact, this is a SDP relaxation for solving the maxcut problem for the case of 3 subgraphs. import picos as pic maxcut = pic.Problem() …
Sergey Steblyov
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Minimax optimization in PICOS

I have a generic question on how to solve optimization problems of the Min-Max type, using the PICOS package in Python. I found little information in this context while searching the PICOS documentation and on the web as well. I can imagine a simple…
Pavithran Iyer
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Making a Qobj out of a picos variable

I need to write a semidefinite program that minimizes the trace of an operator, say R, subject to the constraint that tr_A(R)^{Tb} >>0 . That means that R represents a 3 qubit quantum system and the trace over the first system gives you an operator…
Qubix
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