#About

I first came in contact with symmetric functions at Formal power series and algebraic combinatorics, (FPSAC), back in 2011. There is a plethora of generalizations of Schur functions and somewhere I decided that I wanted a good overview of all the definitions, relations and results. The project is very much inspired by Schur functions: Theme and variations by I. Macdonald [Mac92].

The initial effort consists of the relation graphs made with TikZ and Mathematica, and after showing this to people I got plenty of positive responses. I then decided to put it online. Note that I am biased towards research I am more familiar with.

Please send me an email if you find this page useful or have any feedback.

#Contributions

I am grateful for the content contributions and suggestions by O. Azenhas, D. Grinberg, S. Hopkins, M. van Leeuwen, S. Ram and M. Wachs.

I am also grateful for some web design help provided by Rasch Alexander (cookie notice, mobile user interface).

#Content

The following types of content are given priority.

  • Basic definitions and references, even recent references on arxiv.

  • Open problems and conjectures. In particular, make it easy for new researchers to start working on open problems.

  • Brief overview of formulas such as analogs of Jacobi–Trudi identities.

  • Some extra pages on topics that I would have found useful when doing my PhD.

If you have a particular formula, problem or result you want to promote, please send me an email. Even better, provide a DOI or .bib-file with the reference and write the text and send it to me.

The entire website covers currently about 800 topics (by counting sections and subsections), and uses a .bib file with over 1200 references. It was first published online around February 2019.

#How to cite

You can use the following BibTeX entry when citing:

@misc{Alexandersson2020,
 author = {Per Alexandersson},
 title = {The symmetric functions catalog},
 howpublished = {Online},
 url = {https://www.symmetricfunctions.com}
} 

#Website

There are no fancy techniques used on the website. I write the information in plain files using LaTeX syntax and convert this to HTML using Pandoc and Lua before uploading. The references are automatically incorporated through this system using BibTeX. I have used AI extensively to develop this build process. The full code is available on Icon: github GitHub.

There is also a sister site, arXiv Companion, which provides a curated overview of recent arXiv preprints related to symmetric functions and algebraic combinatorics.

The math is rendered using the JavaScript library KaTeX and I use FontAwesome for some of the icons. It is my intention to keep the website mobile friendly as about \(30\%\) of the users access the page using a phone.

I host this web page on Inleed.se, a Swedish web hosting service with excellent customer support. The running yearly cost is about:

  • Web server (space): 60 USD.

  • Domain name: 20 USD.

If you use the site and want to help cover these running costs, you can use this donation link.

Bibliography

  1. [Mac92]Ian G. Macdonald. Schur functions: Theme and variations. Séminaire Lotharingien de Combinatoire [electronic only], 28:5–39, 1992.
    .bib
    @article{Macdonald1992,
    	author = {Ian G. Macdonald},
    	journal = {S{\'{e}}minaire Lotharingien de Combinatoire [electronic only]},
    	language = {eng},
    	pages = {5--39},
    	publisher = {Universit{\"{a}}t Wien, Fakult{\"{a}}t f{\"{u}}r Mathematik},
    	title = {Schur functions: {T}heme and variations},
    	url = {http://eudml.org/doc/119412},
    	volume = {28},
    	year = {1992}
    }
    

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