# SD and BD integrator source code

**URL:** <https://gromacs.bioexcel.eu/t/sd-and-bd-integrator-source-code/1524>\
**Category:** User discussions\
**Created:** [February 1, 2021, 11:50am UTC](https://gromacs.bioexcel.eu/t/sd-and-bd-integrator-source-code/1524 "2021-02-01T11:50:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![palash](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@palash](https://gromacs.bioexcel.eu/u/palash)\
**Post date:** [February 1, 2021, 11:50am UTC](https://gromacs.bioexcel.eu/t/sd-and-bd-integrator-source-code/1524/1 "2021-02-01T11:50:55Z")

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GROMACS version:5.0.6  
GROMACS modification: Yes/No  
Here post your question  
Where can I find the source code of Stochastic dynamics (SD) and Brownian Dynamics (BD) Integrator?

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**Author:** ![hess](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/hess/32/416_2.png) [@hess](https://gromacs.bioexcel.eu/u/hess)\
**Post date:** [February 1, 2021, 8:35pm UTC](https://gromacs.bioexcel.eu/t/sd-and-bd-integrator-source-code/1524/2 "2021-02-01T20:35:45Z")

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in src/gromacs/mdlib/update.cpp, if I recall correctly where it was in this 6 year old version.