convex-optimization Questions
1
I'm trying to solve a simple optimisation problem, we want to have a complex valued Hermitian matrix as its variable (topic is quantum mechanics).
using Convex #load the optimization solvers
using ...
Claudeclaudel asked 5/3, 2016 at 10:42
3
I have a set of points W={(x1, y1), (x2, y2),..., (xn, yn)} on the 2D plane. Can you find an algorithm that takes these points as the input and returns a point (x, y) on the 2D plane which has the ...
Spooner asked 30/7, 2019 at 17:40
4
I am looking for a recommendation (or comparison) of solvers for second order cone programming with regard to evaluation speed. The solver must be free for non-profit use or open source.
I a...
Lin asked 2/4, 2014 at 17:14
1
Solved
I want to translate a LMI-constrained optimization problem from Matlab to Python. While reading the CVXPY documentation, I found that I can define an LMI-constrained problem by creating a matrix va...
Spancake asked 20/8, 2018 at 17:55
2
I'm misunderstanding the idea behind the minima in the derivation of the logistic regression formula.
The idea is to increase the hypothesis as much as possible (i.e correct prediction probability...
Fabricate asked 9/10, 2016 at 13:7
1
I am using CVXPY (version 1.0) to solve a quadratic program (QP) and I often get this exception:
SolverError: Solver 'xxx' failed. Try another solver.
which makes my program really fragile. I...
Marquis asked 13/4, 2018 at 8:51
1
I am trying to do element-wise multiplication in CVXPY in the objective function. Is this allowed as part of a convex problem?
X is a n x 1 variable.
V is a n x n constant.
I want to do the equi...
Bove asked 11/4, 2017 at 0:52
1
I want to solve this problem using CVXPY but I don't know why I get the following error message:
DCPError: Problem does not follow DCP rules.
I guess my constraints are not DCP. Is there any ...
Enthymeme asked 3/6, 2017 at 11:6
1
Solved
I'm trying to solve the problem
d = 0.5 * ||X - \Sigma||_{Frobenius Norm} + 0.01 * ||XX||_{1},
where X is a symmetric positive definite matrix, and all the diagnoal element should be 1. XX is s...
Applesauce asked 22/4, 2018 at 12:47
3
Suppose my constraint is the product of the first column and third column of the matrix variable is greater than one. How can I implement in CVXPY? Example:
w = Variable(4,3)
In Matlab, my cons...
Patentor asked 16/3, 2017 at 2:16
3
Solved
I need to solve (many times, for lots of data, alongside a bunch of other things) what I think boils down to a second order cone program. It can be succinctly expressed in CVX something like this:
...
Barns asked 26/4, 2013 at 18:54
13
Solved
I am using CPLEX for solving huge optimization models (more than 100k variables) now I'd like to see if I can find an open source alternative, I solve mixed integer problems (MILP) and CPLEX ...
Soldierly asked 2/2, 2009 at 3:19
1
Solved
I am trying the following as learning exercise in CVXOPT. I have made minor modifications to the example code here by removing the inequality constraints and adding few more equality constraints.
...
Do asked 19/12, 2016 at 2:40
5
Solved
I am planning a visualization of flows though Concave Bisymmetric hexagons with two mouths.
Example where the length of the side d1 equals the other length of the side d2:
which naming I discu...
Telophase asked 23/5, 2015 at 9:57
1
Solved
When solving optimisation problems in cvxpy, is there a nice way to check that the constraints are valid by substituing in actual values for the optimisation variables?
I have a complicated optimi...
Lumumba asked 6/6, 2013 at 23:55
7
Solved
Does anyone know of such a library that performs mathematical optimization (linear programming, convex optimization, or more general types of problems)? I'm looking for something like MATLAB,...
Astrobiology asked 27/9, 2008 at 4:52
1
Solved
This is my first post to stackoverflow, so if this isn't the correct area I apologize. I am working on minimizing a L1-Regularized System.
This weekend is my first dive into optimization, I have a...
Suffrage asked 5/1, 2013 at 21:44
1
I am implementing SVM using scikit package in python. I am having difficulty while interpreting the "alpha i" values in plot_separating_hyperplane.py
import numpy as np
import pylab as pl...
Isidraisidro asked 5/10, 2012 at 13:10
4
Solved
I found some solutions, but they're too messy.
Transposal asked 17/10, 2010 at 14:31
1
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