# Questions tagged [reference-request]

For questions asking for references from the literature or textbooks on specific topics.

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182 views

### Textbook recommendation for multiple traveling salesman problem transformation to standard TSP

I am looking for a good textbook explaining: "Transformation of Multiple Traveling Salesmen Problem to the Standard Traveling Salesman Problem."
95 views

### k -MST problem based on Miller-Tucker-Zemlin subtour elimination constraints

Where can I find the formulation of the $k$-MST ($k$-minimum spanning tree) problem as (mixed) integer linear program based on Miller-Tucker-Zemlin subtour elimination constraints (MTZ)?
548 views

### Deep Reinforcement Learning for General Purpose Optimization

Recently, I attended a very nice talk given by someone at the place I work about applying Deep Reinforcement Learning (DRL) for a design optimization problem. It was particularly interesting to me ...
59 views

### Are there any optimization problem related to preventing Covid-19 Transmission?

I am talking about optimization problem about spraying disinfectant in public spaces which preventing Covid-19 Transmission.
141 views

### References for Game theory with Operations Research Orientation

I am studying the book by Martin Osborne "An Introduction to Game Theory". My background is IE and I am more familiar with OR. Is there any book that teaches Game theory in Operations ...
73 views

### Production planning with production regularity over time

I've been studying a problem of the following kind: $T = 1,\ldots, \max{T}$ is a discrete period of time, and we can use every production unit $i \in I$ at most twice. Every unit has a fixed attribute ...
516 views

### Algorithm for simplifying a set of linear inequalities

I am looking for an algorithm that, given a set of linear inequalities in $m$ variables, returns a simplified set. "Simplified" may mean an equivalent set with a smallest number of ...
3k views

### Is there a Linear Programming Library that natively supports fractions instead of floating point arithmetic?

If one recalls how the Simplex method is taught by hand in most LP classes it takes place entirely in $\mathbb{Q}$. All operations yield exact fractions. For this reason I'm looking for linear ...
295 views

### Learning local search operator selection

I'm just reading [1]. The authors use a neural network to solve capacitated vehicle routing problems through iterative generation of tours by solving a price-collecting traveling salesman problem in ...
57 views

### What is the first mention of the modelling cycle in OR?

The first reference to the modelling cycle (reality, model, solution, implementation) for operations research I found, is the paper "Operations research from the viewpoint of general systems ...
119 views

### What are examples of integral polytopes, where there exists an algorithm to write a given point as a convex combination of integral points?

Given a set of integer points $S$, one is often interested in finding $\operatorname{conv}(S)$ or characterizing certain cases, where $\operatorname{conv}(S)$ is described by few inequalities. ...
78 views

### Combined arc capacity constraints in network flows

Consider the network flow polyhedron for a directed graph $G = (N, A)$. Along with the standard flow-balance and single-arc capacity constraints, we are faced with additional constraints which enforce ...
254 views

### What is good introductory literature on (meta)heuristics?

What textbook/articles would you use to introduce heuristics and meta-heuristics to OR students? Assume they have already seen some OR (e.g., LP and MILP).
64 views

### Procurement and supply management: model-oriented undergradute textbook

I look for an undergraduate-level textbook on procurement and supply management that is largely organized around (reasonably simple) mathematical models. The texts I have reviewed so far are all ...
451 views

### How to handle an IP sub-problem with an objective function in Benders Decomposition

I have a question on Benders Decomposition (BD). Suppose I have an MILP model which can be decomposed into a master problem (MP) including integer and continuous variables and a subproblem (SP) ...
137 views

### Global Optimization when the exponential function is involved

I wonder if there are methods to determine the global optimum of MINLP problems, when the nonlinear functions involved are only of the form $Z = Y e^{- \alpha X}$, where $Y \ge 0$ and $X \ge 0$. Are ...
64 views

### Complexity \ Reference request for variant of max flow problem

In the standard max cost flow problem with arc capacities, the cost of using an arc is proportional to the flow through the arc. For example, if $f_{uv}$ is the flow through the arc $(u,v)$, then the ...
232 views

### Constraint programming resources

I am looking for resources to learn constraint programming. I will divide the resources I am looking for in three types: Modeling Is there resources (books, articles, courses, etc.) that are ...
34 views

### Is this a common generalization of the independent set problem?

Suppose a minimum weighted independent set in a conflict graph with $n$ vertices. The basic version is where each vertex $i$ is associated with a weight $c_i$. i.e., there is a vector $C$ for the ...
31 views

### Algorithms for finding step sizes which satisfy the Wolfe conditions?

I am a student studying optimization, and I am interested in algorithms which finds step sizes satisfying the Wolfe (or strong Wolfe) conditions. I do know of one book which provides such an algorithm:...
76 views

### How to evalute the quality of a solver (beyond solution quality and time efficiency)?

I built a solver for a classic scheduling problem. It has some exact methods and some heuristics methods. I want to judge the quality of the work beyond time efficiency and solution quality. For ...
126 views

### Accessible introduction to L-shaped methods/Benders decomposition

I am looking for papers or other resources that provide an accessible introduction to L-shaped methods/Benders decomposition for solving stochastic linear programming-ideally something focused more on ...
134 views

### How to implement a local search with different operators?

I read some papers on local search. I remark that several authors use different move operators. However, the pseudo-code I found on google only uses one operator. I am wondering how to implement the ...
176 views

### Meta papers on operations research

Some time ago, I wrote this answer: https://or.stackexchange.com/a/3323/405 to a question here on this stack exchange. I've had similar discussions with colleges, but I never found anything written ...
69 views

### Books in applied Online Optimization

What are books on Online Optimization other than Introduction to Online Convex Optimization? Preferably: more on applied side, rather than theoretical not limited to convex only
1k views

### 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 ...
53 views

### Maximizing 1-norm: using binary variables to relax non-convexity

It is well-known that when we maximize a 1-norm, e.g., $\|Ax\|_1$, we can use binary variables and obtain a mixed-integer convex problem (otherwise maximizing 1-norm is non-convex). I am mentioning ...
322 views

### 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 those binary ...
65 views

### Combining Machine learning and Operations research on a scheduling problem

I am wondering if there is any attempts of combining OR and ML in the following way. Priority-based rules are widely used in Resource Constrained Project Scheduling Problems. Is there a way to train ...
166 views

### What are Operations Research applications for 'morally discussable causes'?

Out of curiosity, since I read this question What are Operations Research applications for 'good causes'? and thought it might be a good addition to it. What are Operations Research ...
61 views

### Covering problem on a network (?)

I have this problem described in natural language, and I was wondering whether it is relatable to any known problem. I have a directed acyclic graph. Each node can host a "probe". If node $i$ hosts ...
3k views

### What are Operations Research applications for 'good causes'?

I am looking for applications of OR for good causes, possibly with some literature. I intend a good cause loosely defined in the sense that the scope is that of improving the well-being of others, e.g....
138 views

### Maximum Flow Problem : Can someone refer me to accessible valuable resources

Can anyone please refer/suggest me some accessible papers, works, books, websites, documentation related to The Maximum Flow Problem.
149 views

### Suggest me good books to learn heuristics to solve Operations Research problems using python

Suggest me some good books with implementation of heuristics using python to solve operations research problems
96 views

### How to detect unbounded problems

How can I algorithmically detect whether an (MI)NLP problem is unbounded or not? Finding a source for this has proven tricky, because people in the literature seem to talk a lot about what to do if ...
116 views

### Is this another variant of Job Shop Scheduling Problem?

The problem is as follows: there are $n$ jobs $\mathcal{J}=\{J_1,\ldots, J_n\}$, each of which could be done. There are $k$ machines $M_1,\ldots,M_k$ that work in parallel, independently of each other,...
206 views

### Protein folding and protein design relation

I understand from this active COVID-19 question: Are there any COVID-19 (coronavirus) related optimization problems with input datasets that we can "crowd solve"? that the protein folding ...
319 views

### if-else condition for the objective variable using big M notation

Let $0\leq \beta\leq 1$ be an objective variable. The size of $\beta$ is $N\!\times\!N$. Now, how can I impose the following? if $\beta_{i,j}>0$ then $\beta_{j,i}=0$ Big M notation can be ...
46 views

### Discrete optimization in transport economics

I was working on a problem in transport economics where the optimal number of trips in a given duration of time is to be found out. The profit is a function of the price vector $p$ and time cost $c$ ...
149 views

What are the good text books to learn SQP? Are there any online courses that you can suggest?
3k views

### Is it necessary to study rigorous math courses in OR?

I am a business student with engineering background and I am studying papers published in some journals like Management Science, Operations Research, Math of OR and they use some notations and ...
952 views

### Solving continuous Minimax Optimization problem

I want to solve a linear programming minimax problem here mathematically without using software: \begin{align*} \text{min}\ \text{max} \quad & \{x_1,x_2,x_3\} \\ \text{s.t.} \...
282 views

### Safety stock when there is uncertainty in order completion

Safety stocks account for uncertainty both on demand and provider lead times, but never mention how to include the effect of incomplete orders. For example, what would happen if a provider always ...
72 views

### Aggregate production planning

I'm looking for an optimization model about production planning that takes the following into consideration: Single site Multi products One machine/resource Sequence-dependent Fixed batch ...
244 views

### Customer clustering to solve very large-scale VRPs

I am looking for references that used customer aggregation to solve large-scale Vehicle Routing Problems. By aggregation, I mean clustering the customers together and representing them with one node ...
97 views

### Variant of job shop scheduling problem

I'm looking to identify a problem in the literature that I'm currently solving. I have a set of jobs each having a set of operations. Each operation has a duration. An operation may be done by a ...
195 views

### Sources to learn about Sample Average Approximation for practitioners

I want to start learning Stochastic Programming, beginning with SAA (Sample Average Approximation) and keeping a practitioner's perspective in mind, i.e. I would like my sources to collectively cover ...
297 views

### Metaheuristic to solve general MIPs

Many papers formulate their (NP-hard) problem as ILP or MILP and then show Cplex/Gurobi are unable to solve instances of a certain size. Then they introduce a meta-heuristic solution approach to solve ...
432 views

### What are best practices to make optimization user interfaces intuitive for the user?

For many operations research applications a user will often be in charge of making the final decision and will use the optimization algorithms software as a part of their planning flow. Therefore, ...
69 views

### Understanding HardRouteConstraint

I am trying to understand the route constraints in jsprit. While I got the concept of HardActivityConstraint, I am unable to have clarity on HardRouteConstraint. Can someone, preferably with a simple ...