A new website for the stacks project

Today the new version of the Stacks project website went online! Before reading the rest of this post, I suggest heading over there and checking it out!

First of all, huge thanks go to Pieter Belmans who wrote all the code for the website (and also the previous website). It was Pieter’s idea to start using plasTeX to parse the LaTeX code. To parse mathematical texts including lots of formulas with plasTeX a lot of code was added to plasTeX by Pieter Belmans and Raymond Cheng. Combining this with the latex code you find in the Stacks project you get the website you see when you click on the first link above. To read about the interplay between the different parts or if you want to setup a site like this for yourself, please visit the Gerby project website.

There are several improvements of the new site over the old one. The foremost for users is probably that the new site works very well on phones and tablets. Most of the features of the old site are still there, except for the graphs; these may return in the future — feel free to help us with that! You can also help us by letting us know if you find some button or feature of the new site that doesn’t work as expected. Either leave a comment on the site, make an issue on github, or email one of us.

On a technical level, a big improvement of the new site over the old one is the separation of the website and the underlying latex project. This makes it significantly easier to start your own geometry over F1 project. Again, please visit the Gerby project link above to see how… Of course you still have to write all the mathematics yourself!

Worked through your comments

OK, once more I have worked through all the comments left on the Stacks project website since I did last time. Thanks to everybody.

One thing that’s different this time is that I have not updated the server with the corresponding changes over the last few days. This will happen at the beginning of the next week when we switch over to the new website running the Stacks project (thanks to work of Pieter Belmans and Raymond Cheng). I will write another blog post when that happens. For now, if you are interested in the tools we will be using, you can take a look at plastex and gerby-website.

Your name in native script

Perhaps you are a contributor to the Stacks project and you would like to see your name spelled differently or you would like your name displayed in your native script. Although there are all kinds of technical difficulties with this, Pieter Belmans and I would like to try to do this. If you are interested please email your name as you would like to have it. For example try sending the info using Unicode or HTML escape characters.

[Edit 2/18/2018: OK, we’ve started to implement this. Look at the link to the contributors file above or look on contributors page.]

Up to date

OK, over the last few days I have worked through all the comments left on the Stacks project. There were some interesting ones that needed a bit of thought. Please keep them coming!

Leaving comments

If you want to leave a comment about a lemma, definition, remark, etc, please click through to the page of the lemma, definition, remark, etc and then leave a comment. Only leave a comment on a section if your comment is about the whole section or about text which is not in any environment, e.g., it is about the introduction to the section. This should be pretty rare.

If you have a longish comment involving mathematics and especially latex code, it is helpful to send a copy of your comment to the email address for the Stacks project (stacks.project..at..gmail.com). This will make it much faster for me to incorporate your suggested changes.

Technologically advanced people can use github and do a pull request.

Finally, if you don’t want to comment in public, then you can email the stacks project at the address mentioned above. Of course, I will be the one dealing with your email, since I am currently the maintainer of the project. So you could also decide to email to my personal email address. But if you do so, then there is a chance that I will overlook your email due to the large volume of incoming email in my personal email account. So I strongly prefer emails addressing issues with the Stacks project to be sent to the Stacks project email address.

Thanks for all your comments!

Mgbar

One of the original goals of the Stacks project was to work through most of the “preliminary” material in the paper of Deligne and Mumford. Here I mean the material on algebraic stacks and on moduli stacks of curves, before one actually gets to the “interesting” part, namely, why the moduli stack of curves of a given genus is irreducible. This is now done. Currently the last theorem of the Stacks project is about how the moduli stack Mgbar is a proper and smooth Deligne-Mumford stack over Z for g >= 2.

Enjoy!

PS: I will make an effort to write more frequently here about what is going on with the Stacks project. In particular, I should write about the very successful Stacks project workshop which we just had, about what is next in line to be put in the Stacks project, about the wonderful people who help out with the Stacks project, and about how we’d like more people to help Pieter Belmans to code up parts of the new Stacks project web site!

6000 pages

OK, as promised here this means a party! It will be at my house on Saturday evening. Drop me an email if you are in town and I’ll give you directions, etc. See you there!

Yet another update and …

OK, I’ve worked through your comments and made changes in the LaTex. Later today I will update the Stacks project so the changes will be reflected online too. Thanks to everybody.

Also, we’ve reached 6000 pages which means we’re going to have a party soon (similarly to when we reached 5000 pages). Keep watching this blog to learn more.

Updated again

Thanks for all your comments on the Stacks project. I especially enjoy the comments pointing out actual mathematics errors and even more those that calmly explain what went wrong and how to fix it. But all comments are good. We now have more than 250 people who have contributed a bit (and some contributed a lot). Thanks to all.