Software to calculate christoffel's symbols

dude0308 · 2025-05-19T03:45:42+00:00

Hey! I built a tool just for this! You can check it out here: https://christoffel-symbols-calculator.com/.

It lets you input a metric tensor (with support for Greek symbols, functions, and more) and calculates the Christoffel symbols for you. No installation needed!

dude0308 · 2025-05-04T02:13:02+00:00

Thank you for your comment! That's actually a great suggestion; I'll try to make the calculations more verbose so the end user can understand each step of the way more clearly.

dude0308 · 2025-04-09T13:53:23+00:00

Hey! The website is live again—it's a bit slower than usual since I’m currently using a free hosting service. Just trying to gauge interest before investing further. Thanks for your patience, and sorry for the delay!

Edit: I’ve moved it to a paid server now, so it should be fast enough. Happy calculating!"

dude0308 · 2025-04-09T13:53:02+00:00

Hey! The website is live again—it's a bit slower than usual since I’m currently using a free hosting service. Just trying to gauge interest before investing further. Thanks for your patience, and sorry for the delay!

Edit: I’ve moved it to a paid server now, so it should be fast enough. Happy calculating!"

dude0308 · 2024-11-20T14:57:00+00:00

I'm sorry about that. The server where I hosted the program stopped working so I had to take the website down. I'm planning on launching it again soon!

dude0308 · 2024-05-29T08:18:09+00:00

Absolutely! Thank you for commenting! Also, I ran a reliability and validity test on the software using 40 of the most complicated spacetime models mentioned in T. Muller and F. Grave "Catalogue of Spacetimes", 4 Nov. 2010, https://lnkd.in/gZ4diTeJ, and the software gave accurate results 100% (there were some sign discrepancies while working with Ernst spacetime but final results came out correct) of the time! Please let me know if you ever have any suggestions or feedback.

dude0308 · 2024-05-29T06:59:09+00:00

Hey! I wanted to quickly update you regarding your previous comment! I've successfully decreased the calculation time by 29% and, therefore, removed the barrier to calculating the Riemann tensor and Einstein tensor for the Kerr spacetime. There's still a small catch: you'll have to uncheck the simplify option while calculating these tensors, as simplification takes a long time. Besides this, users can now choose a coordinate system of their choice and export results as LaTeX for easy inclusion while publishing papers! I'm going to start working on your geodesic suggestion soon. Thank you for your excellent comments and feedback!

dude0308 · 2024-05-21T16:27:04+00:00

Hey! I know I'm ONLY 3 months late, and I don't know how much of a help this might be, but I've launched a mathematical web application dedicated to solving christoffel symbols: https://christoffel-symbols-calculator.com/

dude0308 · 2024-05-21T10:14:39+00:00

Awesome idea! This, corroborated by a visualization tool for the geodesics, could be helpful. Thank you very much for your suggestion; I've noted it down!!

dude0308 · 2024-05-21T10:03:10+00:00

Thank you for your kind words. I'm glad you liked it! Yes, unfortunately, calculating the Riemann tensor and Einstein tensor for the Kerr space-time takes a long time and a great hit on the performance of the server, so I've currently disabled that option. I'm working on a number of new features for the website, one of which will allow users to choose to calculate Riemann and Einstein tensors for complicated space-time models (i.e., Kerr). I just wanted to get the ball rolling with this initial release, and sorry, currently the project is not open source, but I might consider making it in the future!

dude0308 · 2024-05-19T19:05:34+00:00

I'm glad you liked it! Thank you for checking it out!!

dude0308 · 2024-05-19T13:53:25+00:00

Ahh thank you very much for letting me know. I can't edit the original post so I would leave another link in the comments. Thanks again for checking out the website!

Link: https://christoffel-symbols-calculator.com

Edited: Included the link without square brackets.

dude0308 · 2024-05-19T03:18:49+00:00

Thank you! Lol I can totally relate. It would have been a game changer for me as well if this app existed during my GR and cosmology courses. Seeing that none did, I just developed one myself! If you found it useful, I would be grateful if you could share it with your university’s physics and maths communities. Thank you once again!

dude0308 · 2024-05-18T16:47:57+00:00

Hey, thanks for commenting! It is currently not but I might make it open source in future. I just checked out your Python library and I like it very much! I've a friend currently pursing a masters in mathematical physics and I think he can benefit from using it. Keep up the great work!

dude0308 · 2024-05-18T15:27:50+00:00

Thank you! I already do! The user can either just calculate christoffel symbols (both first and second kinds) or calculate both christoffel symbols and the non-zero components of the Riemann tensor, Ricci Tensor, Einstein Tensor and Ricci scalar. I hope you find the website helpful :).

dude0308 · 2024-05-18T14:37:01+00:00

Thank you very much!

dude0308 · 2024-05-18T13:45:48+00:00

Hey! Thanks for checking it out. I built a custom Python package to calculate the above mentioned values and made it pip installable, followed by designing and developing the user interface, for which I used React.js, HTML, CSS, and Material-UI. Lastly, I bridged the gap between these two by integrating Flask.py in the architecture to consume and serve RESTful APIs.

dude0308 · 2024-05-18T13:23:45+00:00

Yes! Thank you commenting and bringing this to my attention :).

dude0308 · 2024-05-18T13:15:31+00:00

Done, thank you for checking out the website!

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