SFBA.social

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Solver MaxPivot irrigators in a 100 acre fieldWe formulate a non-linear, non-convex model for optimizing the layout of centre-pivot irrigators in a field. Several free and commercial solvers fail to find good solutions. Then we try the MINLP-BB solver via NEOS using a multi-start technique. Can it find an optimal solution? <a href="https://mathstodon.xyz/tags/python" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#python</a> <a href="https://mathstodon.xyz/tags/orms" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#orms</a> <a href="https://www.solvermax.com/blog/pivot-irrigators-in-a-100-acre-field" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.solvermax.com/blog/pivot-irrigators-in-a-100-acre-field</a>

Marco LübbeckeJob opening at TU Graz: Full Professor Position for Computational Discrete Mathematics <a href="https://mas.to/tags/orms" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#orms</a> <a href="https://jobs.tugraz.at/en/jobs/dec7b342-9f50-f780-b335-67c226f4d322" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://jobs.tugraz.at/en/jobs/dec7b342-9f50-f780-b335-67c226f4d322</a>

Earl C. Ruby III<a href="https://mastodon.social/@philbetts" class="u-url mention">@philbetts</a> The point of <a href="https://sfba.social/tags/ORMs" class="mention hashtag" rel="tag">#ORMs</a> is more about making it easy to do persistent <a href="https://sfba.social/tags/CRUD" class="mention hashtag" rel="tag">#CRUD</a> operations on <a href="https://sfba.social/tags/Python" class="mention hashtag" rel="tag">#Python</a> data. They obfuscate <a href="https://sfba.social/tags/SQL" class="mention hashtag" rel="tag">#SQL</a>, and can make badly-performing queries, but they don’t eliminate the need to know SQL to make them work well. Better to learn SQL first before diving into ORMs unless your database is really simple.

brandewinder<a href="https://hachyderm.io/tags/introduction" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#introduction</a>Hi there, I am Mathias Brandewinder, nice to meet you!Work: I write F# code for a living. Particularly interested in solving problems using mathematical models (machine learning, simulation, optimization, ...). In a past life, I wanted to teach.Play: most of my free time lately involves role-playing games. Also cooking, baking sourdough, drawing, playing the guitar rather poorly. And reading! Books are great.<a href="https://hachyderm.io/tags/fsharp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#fsharp</a> <a href="https://hachyderm.io/tags/ttrpg" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ttrpg</a> <a href="https://hachyderm.io/tags/math" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#math</a> <a href="https://hachyderm.io/tags/programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#programming</a> <a href="https://hachyderm.io/tags/orms" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#orms</a>

SaigalDoes anyone know what happened to the P = NP "result" due to Diaby Karwan & Sun announced on the U Conn web page a few days ago? Mention seems to have been scrubbed. Scattered hints remain on the internet. I'm curious to see the original paper and, perhaps more so, about the sequence of events. <a href="https://sfba.social/tags/orms" class="mention hashtag" rel="tag">#orms</a> <a href="https://sfba.social/tags/complexity" class="mention hashtag" rel="tag">#complexity</a> <a href="https://sfba.social/tags/tsp" class="mention hashtag" rel="tag">#tsp</a> <a href="https://sfba.social/tags/optimization" class="mention hashtag" rel="tag">#optimization</a>

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