Tootfinder

This https://arxiv.org/abs/2408.06616 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Gromov-Witten invariants in family and quantum cohomology
A moduli space of stable maps to the fibers of a fiber bundle is constructed. The new moduli space is a family version of the classical moduli space of stable maps to a non-singular complex projective variety. The virtual cycle for this moduli space is also constructed, and an analogue of Gromov-Witten invariants is defined. As an application, we recover the formula for the number of rational degree d curves in P3, whose image lies in a plane in P3 (known as planar curves in P3), intersecting r…

Does the DNC want to play 1840’s Whigs?
Because redoing party internal processes to dislodge a firebrand is a great way to inspire a hard schism.
But hey, I’m no Dem…

Groups admitting Wirtinger presentations and Gromov hyperbolic groups
Toshiyuki Akita
https://arxiv.org/abs/2506.07143 https://arxiv.…

Groups admitting Wirtinger presentations and Gromov hyperbolic groups
Twisted Wirtinger presentations are generalizations of the classical Wirtinger presentations of knot and link groups. In this paper, we prove that if a finitely generated group admitting a twisted Wirtinger presentation is Gromov hyperbolic, then its second rational homology group vanishes. Moreover, if the group is torsion-free, then its second integral homology group also vanishes.

Grumble grumble upgrading Ubuntu-LTS grumble Postgres server grumble.
Even in a toy situation this never works.
I'm just going to deploy a new VM and restore the pg_dump backup onto it, like I should have originally.
#techgore #database

The best thing in the world that you can do is to help someone else with something they need.
That’s not an ethical mandate, it’s a bit of hedonistic advice. Go help someone. If it doesn’t feel great, you’re not doing it hard enough.

Catherine is pretty amazing. Read the thread for the RE… https://mastodon.social/@whitequark/114664566955690364

“The String… will be much faster”
my brain is breaking https://mastodon.social/@Catfish_Man/114655168110161214

Just heard another story on Gaza…
I think my mind was poisoned by OSC. I no longer remember which one but in one of his dystopian futures there’s been a solution to the problem of The Levant: a solid plate of Trinitite from the Euphrates to the Mediterranean. If I recall correctly, he didn’t really go into how it got that way, just tossed in the fact that this was a solution which had been implemented, without details.
I can’t stop seeing that as the only way this stupid fight wi…

But, they were evil. Even if you happen to be descended from them. They did a definitively evil thing, and it was a defining choice of their lives. Everyone knew that the war was about continuing and entrenching slavery. More than any modern war, it was feasible for conscripts to escape service, either by paying or by running west.
I guarantee that every person reading this has some evil ancestor.
Get over yourself, JD.

There are no working quantum computers capable of factoring a 3-digit number. Last I heard, the record was the number 21.

That means there is no “production” environment capable of testing the critical feature. Beyond that, PQC deployment in the wild is new/small enough that we don’t even have a lot of assurance that the implementations live up to theory.