# Detailed Presolve description

**URL:** <https://discuss.ampl.com/t/detailed-presolve-description/1218>\
**Category:** Support\
**Created:** [September 25, 2024, 6:22pm UTC](https://discuss.ampl.com/t/detailed-presolve-description/1218 "2024-09-25T18:22:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![elianacostasilva](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/elianacostasilva/32/848_2.png) [@elianacostasilva](https://discuss.ampl.com/u/elianacostasilva)\
**Post date:** [September 25, 2024, 6:22pm UTC](https://discuss.ampl.com/t/detailed-presolve-description/1218/1 "2024-09-25T18:22:43Z")

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Where can I find the details of the detailed presolve procedure? Thanks

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**Author:** ![4er](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/4er/32/530_2.png) [@4er](https://discuss.ampl.com/u/4er)\
**Post date:** [September 26, 2024, 4:42pm UTC](https://discuss.ampl.com/t/detailed-presolve-description/1218/2 "2024-09-26T16:42:04Z")

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AMPL’s presolve procedure is described in this paper:

> Robert Fourer and David M. Gay, [Experience with a Primal Presolve Algorithm](https://link.springer.com/chapter/10.1007/978-1-4613-3632-7_8). In _Large Scale Optimization: State of the Art,_ W.W. Hager, D.W. Hearn and P.M. Pardalos, eds., Kluwer Academic Publishers (Dordrecht, 1994) 135-154.

You might have access to this paper through a university library. If not, you can access a [preprint](https://ampl.com/wp-content/uploads/pripre.pdf) on our website.