Tootfinder

#ENISA #Publication May 2025
Handbook for Cyber Stress Tests
site:
https://enisa.eur…

Schleswig-Holstein: Kein pauschales Handyverbot, aber klare Regelungen gefordert
In Schleswig-Holstein sollen sich nun auch die letzten Schulen klarer zu privaten Mobilgeräten auf ihrem Gelände verhalten. Ein Erlass soll Druck erzeugen.

Massey products for homotopy inner products
Kate Poirier, Thomas Tradler, Scott O. Wilson
https://arxiv.org/abs/2507.15494 https://ar…

Massey products for homotopy inner products
This paper defines Massey-type products for a homotopy inner product on an $A_\infty$ algebra, called Massey inner products. We include an explicit description of ordinary Massey products for $A_\infty$ algebras, and for $A_\infty$ modules, and show that Massey product sets can have interesting internal structure. We give non-trivial applications from lens spaces, links, and low dimensional manifolds, showing Massey inner products contain information beyond ordinary Massey products.

Formal Concept Analysis and Homotopical Combinatorics
Scott Balchin, Ben Spitz
https://arxiv.org/abs/2507.14068 https://arxiv.org/pdf…

Formal Concept Analysis and Homotopical Combinatorics
Formal Concept Analysis makes the fundamental observation that any complete lattice $(L, \leq)$ is determined up to isomorphism by the restriction of the relation ${\leq} \subseteq L \times L$ to the set $J(L) \times M(L)$, where $J(L)$ is the set of join-irreducible elements of $L$ and $M(L)$ is the set of meet-irreducible elements of $L$. For any finite lattice $L$ equipped with the action of a finite group $G$, we explicitly describe this restricted relation for the lattice of transfer sys…

50 years ago tonight, #JerryGarcia & merl saunders in #berkeley, billed as legion of mary but with sly & the family stone’s greg errico on drums, the 1st of a handful of sub gigs before joining the garcia band on/off in the early ‘80s. sweet audience tape:

EXCLUSIVE: The Onion calls out 'cowardice' of Congress in full-page NYT ad (Marisa Kabas/The Handbasket)
https://www.thehandbasket.co/p/exclusive-the-onion-nyt-ad-congress-cowardice
http://www.memeorandum.com/250622/p26#a250622p26

I will show you fear in a handful of dust.
Frisch weht der Wind
Der Heimat zu
Mein Irisch Kind,
Wo weilest du?
T.S. Eliot

#Immich hat mich heute an dieses Juwel von Fensterwerbung erinnert, von der ich in 2017 glaube ich irgendwo in #Hamburg #Harburg ein Foto gemacht habe. Reinzoomen lohnt sich 😉
Ich lass das hier mal so s…

Thin homotopy and the signature of piecewise linear surfaces
Francis Bischoff, Darrick Lee
https://arxiv.org/abs/2506.16657 https://a…

Thin homotopy and the signature of piecewise linear surfaces
We introduce a crossed module of piecewise linear surfaces and study the signature homomorphism, defined as the surface holonomy of a universal translation invariant $2$-connection. This provides a transform whereby surfaces are represented by formal series of tensors. Our main result is that the signature uniquely characterizes a surface up to translation and thin homotopy, also known as tree-like equivalence in the case of paths. This generalizes a result of Chen and positively answers a ques…

All technology is suspect, and must be considered potentially dangerous.
BUTLERIAN JIHAD, Handbook for Our Grandchildren
#dune #dunequotes