Lennart Lahrs
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Gurobi Staff
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Activity overview
Latest activity by Lennart Lahrs-
Lennart Lahrs commented,
For the public record, Gurobi version 12.0.1 solved the issue Leonard faced with this model and relates to "Fixed bug in implicitly handling lower bounds in cone constraints that can lead to sub-op...
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Lennart Lahrs commented,
Thanks, Leonard, for posting your observations here! I created a support ticket so we can investigate the model files.
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Lennart Lahrs created an article,
How to evaluate Gurobi Compute Server?
Gurobi Compute Server offloads optimization tasks to dedicated hardware – it provides seamless client-server optimization within your own deployment. Client-server optimization helps to achieve con...
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Lennart Lahrs commented,
Our recent release Gurobi Optimizer 12.0 has some improvements in this area which may help here. Specifically, status, best objective value, best bound, mip gap, simplex iteration count, explored a...
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Lennart Lahrs created an article,
Gurobi in Embedded Systems
With solve times shorter than ever and more supported model types, including non-convex MINLP, Gurobi is increasingly considered for applications with very short runtime requirements (sub-second) o...
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Lennart Lahrs created an article,
Solving batches of models with short model runtimes: Efficient API usage, parameter tuning, and deployment considerations
Some Gurobi-powered applications solve large batches of models with very short individual model runtimes. Taking special care with API usage and parameter tuning is sometimes overlooked because the...
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Lennart Lahrs created an article,
Incident response for errors related to WLS (Web License Service)
This article is a reference for maintainers of commercial production applications using WLS licenses. Unless your commercial application is blocked in production, do not mark your ticket as a produ...
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Lennart Lahrs commented,
Both ObjNRelTol and ObjNAbsTol are considered by MIPs, while for pure LPs only ObjNAbsTol is considered and handled differently. The page Working With Multiple Objectives is another good reference ...
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Lennart Lahrs commented,
Correct, this method is referred to as epsilon constraint method.
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Lennart Lahrs commented,
Hi Arun,When using hierarchical multi-objective with two objectives, by default you will receive only a single solution which is optimal with respect to the highest priority objective and also opti...