# Site Feedback

**URL:** https://discourse.abinit.org/c/site-feedback/2.md

[Latest](https://discourse.abinit.org/latest.md) · [Categories](https://discourse.abinit.org/categories.md) · [Tags](https://discourse.abinit.org/tags.md)

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## [About the Site Feedback category](https://discourse.abinit.org/t/about-the-site-feedback-category/1)

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**Author:** [@system](https://discourse.abinit.org/u/system)\
**Replies:** 0

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## [IPA or RPA?...... in optic](https://discourse.abinit.org/t/ipa-or-rpa-in-optic/3371)

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**Author:** [@vinod](https://discourse.abinit.org/u/vinod)\
**Replies:** 1\
**Last updated:** [July 12, 2023, 9:45pm UTC](https://discourse.abinit.org/t/ipa-or-rpa-in-optic/3371 "2023-07-12T21:45:50Z")

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Hii users, I have one general question. In the optic utility https://docs.abinit.org/guide/optic/, somewhere written here is RPA, and sometimes it is written that “Note that optic works in the independent-particle appro…

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## [How to get an invitation code](https://discourse.abinit.org/t/how-to-get-an-invitation-code/3295)

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**Author:** [@jkend](https://discourse.abinit.org/u/jkend)\
**Replies:** 2\
**Last updated:** [March 28, 2023, 3:33pm UTC](https://discourse.abinit.org/t/how-to-get-an-invitation-code/3295 "2023-03-28T15:33:22Z")

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How to get an invitation code？

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## [Formulae are not visible in tutorials](https://discourse.abinit.org/t/formulae-are-not-visible-in-tutorials/3005)

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**Author:** [@mjocic](https://discourse.abinit.org/u/mjocic)\
**Replies:** 2\
**Last updated:** [October 8, 2021, 11:16am UTC](https://discourse.abinit.org/t/formulae-are-not-visible-in-tutorials/3005 "2021-10-08T11:16:18Z")

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Hello, At the time of writing, I noticed that formulae in tutorials are not visible for me (browser: Firefox 92). Hope someone will take notice of this soon. Kind regards, Milan Jocic