\newcommand{\falsepsilon}{\epsilon}

This is my math blog, Eddi, she/they used to be @a-set-of-tight-measures

[functor-reality]

This is an intro to this blog:

This is my math side blog. My name is Eddi. I am a PhD student in mathematics.

My main blog is @thegrayearloftea.

I particularly enjoy geometric group theory, algebra and algebraic/geometric topology.

This blog is supposed to be something between a studyblr and a collection of some fun math posts.

Posts where i said something can be found here.

last edited 30.03.26

[ulysses-but-somehow-more-transer]

whats the most beautiful ring that isnt also a field?

[functor-reality]

Time for an update.

I started my PhD two months ago and it feels like the start has been rather rough. Mostly because I found adjusting to a new topic really hard. My masters thesis just went so smoothly and I enjoyed the topic so much, that I kind of forgot how hard these things can be and that maybe not every topic is something I enjoy.

Also working everyday in an office just does not work well for me. I miss being able to decide when and where to study and taking breaks for chatting with my friends.

Topic wise it is getting better, but if you have advice about the office part feel free to share.

[algebraic-dumbass]

some of you might be curious and wonder what the functor is it that i do (mathematically). haha. thats a good question. im also wondering

[caratheody-diffable]

Oh I’m so excited !!! On Thursday I finally get the doodle of the funny shapes from my exam!! (As in getting them tattooed) CANT WAIT!!!

[neatlymanifolded]

It's crazy that we can't classify surfaces up to (non-orientable) cobordism in non-orientable 4-manifolds yet. We couldn't even do this in orientable manifolds until this year!

The oriented case was done in the 1950s!!! This cannot be that difficult. What's going on

[spectracled-eider]

The age old task for a mathematician to come up with good notation

[mathsuggestions]

Horrendously abuse notation in an attempt to make your point marginally clearer.

[cat-the-comet]

devastating: artist who has not practiced fundamentals enough to execute high concept idea eats shit

[mossquitoman]

came to me in a dream

[raccoonmilf]

When I was in grade school I used to send emails to biologists and zoologists asking them questions to get answers to include in school projects I was working on, and would cry when they did not respond because I thought I was stupid for thinking that some random kid would ever be deserving of a response from someone who does something as smart and cool and important as *checks notes* studies frog fungus.

Now, at 29, I’m lowkey having a panic attack because my academic email is filled with middle schoolers wanting me to answer their questions about pygmy raccoons and I keep putting off answering them because I’m so overwhelmed with all the other raccoon stuff I have to do.

Anyway, greatest apologies to any scientist I ever emailed as a child and also an adult.

[raccoonmilf]

I know your research is really important and I appreciate all you are doing but this is so fucking funny

[groupoids]

so-called "free thinkers" when they're left adjoint to a forgetful thinker (me)

[vacuously-true]

You have to have friends who think your life's passion ain't shit. You have to hang out with people who simply do notttt give a crap about the thing that you find all consuming. Because if you don't, then when you're really stressed about that thing, your friends are also gonna be stressed about it, and you're just gonna end up in a stress feedback loop with no outside input.

But if you have friends who could not possibly give fewer fucks about your calling, then when you're really fucking stressed because it feels like it's your entire world, they can say, "...You know representation theory like... doesn't matter, right? Do you want to get takeout and play a video game? Let's get takeout and play a video game." And then you will get takeout and play a video game and feel a bit better.

[bread-126]

sanest mathematician you know: we need to teach children about groups

[locally-normal]

We do teach children about groups, they do things like explore the symmetries of regular hexagons. At some point we just stop, and we shouldn't!

[transgenderer]

they should put this next to the doors of every grad school building. there should be a legal requirement to put it on the admissions website like a surgeon general's warning

[noncommutativemoments]

Maths posts peut-être?

So I've been learning some cool maths recently and every time I stumble upon a new gem I feel the need to share it with people. I've attempted writing notes before but it gets a bit tedious and time consuming, and most of the time I give up on writing the notes before they get to a point where someone else could actually use them.

Maybe making some posts here is the way to go? Unclear if anyone will ever read them but at least I can get the thoughts out of my head. Unfortunately my research includes words like von Neumann algebras which I cannot always avoid (sometimes I really wish I was a topologist so I could talk about shapes instead) but then again the philosophy is that von Neumann algebras are a model for non-commutative probability/ergodic theory so potentially stay tuned if you might be interestead in what an s-malleable deformation of an action is?

[krasnoarmeyets]

had a dream i was cleaning a higher dimensional euclidean space (i think R^4) by wiping it with a wet cloth as one would a 2d surface like a table