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# Operations Research : Recent Questions and Answers (Page 2)

## Are Python and Julia used for optimization in industry?

I am giving a small computer exercise that aims at teaching students the basics of a modelling language to model small optimization problems. So far I have been using the...

## How to improve the quality of code in OR?

So I noticed, that a lot of students taking OR-classes come from non-computer science backgrounds (e.g. buissiness administration). They typically had only one other class in their first semester where...

## How would you characterize "optimization data?"

We often hear that in practice, not enough data of sufficient quality, consistency, recency, etc. is available for feeding into mathematical optimization models. Example: my university wanted to plan/optimize their...

Asked on 08/19/2021 by Marco Lübbecke

## How to simulate computational execution time?

I am working with some computational experiments with an Integer Programming (IP) formulation over a well-known set of instances from the literature of my problem. And I would like to...

## Local optimum of dual of non-linear program

In general, suppose you have a non-convex optimization problem with constraints and you form the dual problem. If you find a local optimum for the dual problem, will the corresponding...

## Combinatorial Optimization using AMPL

I want to solve the following integer programming problem using AMPL. The problem is the following (It was already asked on mathstackexchange.com, but I need...

## Parallel nonlinear solvers

I've noticed that parallel (CPU or GPU) nonlinear programming solvers are few and far between. It seems that if any parallelization is involved at all, it generally applies to solving...

Asked on 08/19/2021 by Josh Allen

## Tips on How to Review Operations Research Literature Effectively?

As part of our department Ph.D. research methodology course, I'm going to give a short online lecture on how to review the literature effectively. As the course organizer asked us...

## Polynomially solvable cases of zero-one programming

I am dealing with a problem having two types of variables: binary variables, and continuous variables. In some cases, the continuous variables are not used, and so the problem contains...

## Error evalution for linear fits

I have some data that looks almost linear. I need to make a fit in order to evaluate the slope.The thing is, the slope is changing if I change...