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Urs Schreiber Profile picture
Urs Schreiber
@SchreiberUrs
mathematical fundamental physics at NYU in Abu Dhabi, Center for Quantum and Topological Systems
Mar 2, 2021 • 5 tweets • 3 min read
We are finalizing an article:

*****************************
M/F-Theory as Mf-Theory
ncatlab.org/schreiber/show…
***************************** ncatlab.org/schreiber/show…
Mar 1, 2021 • 4 tweets • 3 min read
For the longest time,
the nLab ncatlab.org/nlab/show/Home…
ran
first on dollars from my pocket
and then, until recently,
on a fund kindly provided by Steve Awodey,

Now to stay afloat
we finally have a mechanism that allows:

Everyone to Make A Donation
ncatlab.org/nlab/show/fund… Image The costs we have are not huge,
just running a cloud server, essentially.
But there are costs,
so if you make a small donation
it will help!

The transfer mechanism is
kindly provided by topos.institute/contact

So please earmark you donation
to be for the nLab, as shown here: Image
Nov 13, 2019 • 28 tweets • 15 min read
**Cohomotopy**
ncatlab.org/nlab/show/coho…

=================
The grand unified theory
of differential topology
=================

From spheres to M-theory.
A leisurely thread.

-------------------------------
scroll down for the latest **Ordinary cohomology**

The ordinary cohomology groups

H*(X,Z)

ncatlab.org/nlab/show/ordi…
satisfy a list of nice properties
called the *Eilenberg-Streenrod axioms*
ncatlab.org/nlab/show/gene…
Mar 19, 2019 • 24 tweets • 19 min read
Yesterday in arxiv.org/abs/1903.06169
more on "improved holographic QCD"
ncatlab.org/nlab/show/AdS-…
modelling ordinary cold quark matter
as an intersecting D-brane model
ncatlab.org/nlab/show/inte…
in an asymptotically ~AdS higher dim spacetime. Image Today's arxiv.org/abs/1905.13086
proposes a way to further improve
the experimental match to hadron masses
in the bottom-up approach
ncatlab.org/nlab/show/bott…
to QCD-on-intersecting-D-brane models
ncatlab.org/nlab/show/AdS-… Image
Jan 31, 2019 • 135 tweets • 132 min read
Today in arxiv.org/abs/1901.10484
the claim that requiring
the putative leptoquark
ncatlab.org/nlab/show/lept…
to respect residual abelian
flavour symmetries of Yukawas
makes it not only an "excellent fit"
to flavour anomalies
ncatlab.org/nlab/show/flav…
but also "extremely predictive". Image Also today, in arxiv.org/abs/1901.10480
further analysis of the "high-pT signature"
of the potential vector-leptoquark
ncatlab.org/nlab/show/lept…
that could explain the flavour anomalies
ncatlab.org/nlab/show/flav… Image