New #openaccess publication #SciPost #Physics

Topological holography, quantum criticality, and boundary states

Sheng-Jie Huang, Meng Cheng
SciPost Phys. 18, 213 (2025)
https://scipost.org/SciPostPhys.18.6.213

@maxplanckgesellschaft #Yale

New #openaccess publication #SciPost #Physics #Codebases

Python-JAX-based fast Stokesian dynamics

Kim William Torre, Raoul D. Schram, Joost de Graaf

Paper:
SciPost Phys. Codebases 56 (2025)
https://scipost.org/SciPostPhysCodeb.56

JFSD-v0.2:
SciPost Phys. Codebases 56-r0.2 (2025)
https://scipost.org/SciPostPhysCodeb.56-r0.2

#UU
#IFPRI

A Magnífico Photography composition of the Cosmos superbly captured

Star Cluster NGC 362

#NASA #space #Cosmos #Photography #Physics #Chemistry

https://apod.nasa.gov/apod/ap171011.html

I generally try to avoid flying, but I flew from Edinburgh to Athens to give a minicourse on combinatorics and category theory at the invitation of a former postdoc who is running a summer school.

My flights were delayed and I wound up taking a taxi to my hotel at midnight. Out of the blue, after no conversation, the driver asked me if I was a mathematician or philosopher. When I admitted to the former, he tapped his temple and said "they've got it going on there, no?" His smile was impish yet benign.

When I arrived, I was so exhausted I couldn't figure out how to turn on the shower and simply went to sleep. The next day I sheepishly asked the guy at the front desk to show me how.

Later that day my key card didn't work, so I went to the same guy and said "I think my key card has become demagnetized."

He said "Are you an engineer?"

If this was an insult it was delivered in the most dead-pan manner possible, so I decided to take it as a serious question and said "No, a mathematician". He replied "So was my father", and something about it let me know he was not mainly making fun of me.

Based on this insignificant sample I conclude that the Greeks, or at least the taxi drivers and hotel desk clerks among them, enjoy guessing people's occupations from their looks, and are not bad at it. Also, they are less anti-intellectual than Americans: they do not say "oh, I always hated mathematics" when they hear what I do.

In case you're curious, my lecture notes are here:

• Counting with categories, https://golem.ph.utexas.edu/category/2025/06/counting_with_categories_part.html

Inzwischen hat der 3. Teil des 4. gemeinsamen Beobachtungslaufs der Gravitationswellen-Detektoren begonnen. Am Wochenende gab es dann gleich die ersten drei signifikanten Signalkandidaten.

1️⃣ S250628am: Verschmelzung von 2 Schwarzen Löchern in 2.9 Milliarden Lichtjahren (Lj) Entfernung
2️⃣ S250629ae: Verschmelzung von 2 Schwarzen Löchern in 23 Milliarden Lj Entfernung
3️⃣ S250629bs: Verschmelzung von 2 Schwarzen Löchern in 16 Milliarden Lj Entfernung

#SchwarzeLöcher #Gravitationswellen #Astronomie