Eli Towle

You can pointwise multiply a 1-D ndarray with a 1-D MVar of length one natively. This operation follows numpy's broadcasting rules. For example, the following expression:$$\begin{align} \begin{bmat...

Be careful when using a third-party API to write a model fileMany users call the Gurobi solver through third-party APIs like JuMP.jl, CVXPY, or Pyomo. Such tools may not provide a way to write an M...

You can natively multiply two MLinExpr objects together following normal matrix multiplication rules. For example, consider the following constraint:$$\begin{align} y &= (Ax + b)^\top (Ax + b). \en...

Operations on 2D MVar objects work natively, following the dimensionality conventions of numpy. For example, let \( a \in \mathbb{R}^m \), let \(b \in \mathbb{R}^n \), and let \(X\) be an \( m \tim...

Affected versions: Gurobi v10.0.0Resolved in version: Gurobi v10.0.1IssueGurobi 10.0.0 includes a bug that can result in Gurobi printing an incorrect optimal objective value for multi-objective opt...

It is sometimes necessary to query a constraint's left-hand side (LHS). Use cases include: Printing a constraint definition to verify it is written correctly Evaluating a constraint's LHS at the cu...

In floating license environments, it is possible that all of the tokens are in use. When this happens, no other applications will be able to use Gurobi to solve optimization problems until a token ...

NOTE for WLS users: The command grbgetkey is not used with WLS licenses. Please see How do I resolve an "ERROR 202" when running grbgetkey?The grbgetkey executable is located within the full Gurobi...

A Gurobi license file set up on an AWS EC2 instance will remain valid if the EC2 instance is stopped and restarted. However, a Gurobi license file may become invalid after the EC2 instance is termi...