Felix Leditzky 🏳️‍🌈🏳️‍⚧️

@felixled.bsky.social

745 Followers 571 Following

Associate Professor in Math at University of Illinois Urbana-Champaign | Quantum information theorist | Vienna native | CHI & STL fan | (he/him)

Excerpt from the paper https://arxiv.org/abs/2506.07192 about strange and problematic terminology in graph theory.
Cumin and Paprika being sceptical of strangers in the apartment.
Our two black cats, Cumin and Paprika, hunting their favorite bird toy.
Cumin and Paprika, our two black cats, "hunting" their favorite bird feather toy.
Our two black cats Cumin and Paprika napping on the cat tree platform.
Geordi La Forge meme advertising to use \coloneqq, \|X\| and f\colon X \to Y in LaTeX instead of :=, ||X||, f: X\to Y.
Screenshot of an arXiv posting highlighting the DOI link and the "Export BibTex citation" button.
Message showing that the UIUC Canvas space was hacked by some group called "Shinyhunters".
Google search result for the wiki page "Binomial coeffcient", with a badge saying "You visit often".
A mathematical statement involving operator inequalities and tensor products. Statement in LaTeX: Let $X,Y$ be operators on a finite-dimensional Hilbert space. If $0\leq X \leq Y$, then $X^{\otimes n} \leq Y^{\otimes n}$ for all $n\in\mathbb{N}$.
Handshake meme with Chicago and St Louis bonding over both being against the Rams today.
A sleeping tiger in the St Louis Zoo.
Comments field of arXiv:2508.13165 "An introduction to the algebra of rings and fields" reading: "499 pages. Will grow once I teach the course on a semester schedule, but for now it is what it is. Comments are welcome!"
Dwight K. Schrute and Michael G. Scott performing their rap song "Lazy Scranton".
My FPL team "Entanglement Wedges"
Reaction to quoted post. User A: This is gonna result in mutliple involuntary admissions to the psych ward. Absolutely stupid idea. User B: "Exploring the intersection of tech and spirituality" gives me hope that tech bros being taken out of circulation will be a net good for society
Sign in the Munich subway showing the quote from Lise Meitner given in the post.
View from The Ha Beach bar in Hersonissos, Crete, Greece
Signed copy of Ben Rhodes's "After the Fall - The rise of authoritarianism in the world we've made"
Excerpt from a paper by Roger Howe on invariant theory, mentioning "Weyl's proof of this theorem uses some general nonsense of multilinear algebra" and "the double commutant yoga yields the theorem".
A copy of the book Quantum Steampunk written by Nicole Yunger Halpern
Austrian ketchup brand called "Felix"
Wilde chips next to Mark Wilde's textbook on Quantum Information Theory
Visualization of the Kraus operators of a quantum channel and its complementary channel by slicing a 3-D array in different ways.
Excerpt from John Watrous's book on Quantum Information Theory, showing Theorem 7.5 about spanning sets for the symmetric subspace. See https://cs.uwaterloo.ca/~watrous/TQI/
About to board flight AA600 to Raleigh, NC to attend QIP2025.
Sign in front of the International Institute in St Louis saying "Refugees are welcome here" and asking to donate at IISTL.org
Wrong example of three orthogonal vectors because ChatGPT thinks that -6 + 0 + 0 = 0.
Mos Def & Talib Kweli are Black Star
A Tribe Called Quest - The Low End Theory
Alice in Chains - Unplugged
Die Fantastischen Vier - MTV Unplugged (2000)
Radiohead - OK Computer (1997)
Quantum information theorist Nilanjana Datta with all of her former and current PhD students.
Parity Error IPA by St Louis based Alpha Brewing Company
Three qubits can be entangled in two different ways.