Tootfinder

All the talks from rstudio::conf 2022: https://www.rstudio.com/conference/2022/2022-conf-talks/ 👩‍🏫 Keynotes: https://www.

#messi heading to his 3rd World Cup
Lionel Messi has played in three World Cup finals. Championship match in 2014 (against Germany) and 2022 (against France), and in 2026 (against Spain)
And #Ronaldo has never played in WC final.

Nvidia acquired Kumo, which sells predictive AI software to enterprises, a source says for $400M ; PitchBook: Kumo raised $37M at a $250M valuation in 2022 (The Information)
https://www.theinformation.com/articles/nvidia-buys-enterprise-mo…

Nvidia Buys Enterprise Model-Maker Kumo AI for at Least $400 Million
Nvidia has bought Kumo AI, a five-year-old startup that sells predictive AI software to enterprises, for more than $400 million, said a person with knowledge of the deal. The acquisition, first revealed by an Nvidia executive in a LinkedIn post on Tuesday, should expand Nvidia’s roster of AI ...

Girls just wanna have Pfand

In the Summer of 2022, Greek politician Stelios Kouloglou was investigating how intrusive spyware had been used to hack business leaders, law enforcement officials, and politicians.
As part of the European Parliament’s PEGA Committee,
set up to investigate the use of the notorious Pegasus spyware and other variants,
Kouloglou travelled to interview spyware victims and probe high-profile cases.
That fall, according to a new forensic analysis,
💥Kouloglou’s iPhone …

EU Politicians Investigated Pegasus Spyware. Then It Ended Up on One of Their Phones
“It is a direct attack on the rule of law,” says one European Parliament member of the new findings from Citizen Lab.

Statscast - Energy Storage Stats Special (2022-05) - Energy changes and stats from 16WW up to May 2022. #podcast #stats #microgen -

Statscast - Energy Storage Stats Special (2022-05)
Energy changes and stats from 16WW up to May 2022. #podcast #stats #microgen

@… https://podcasts.apple.com/us/podcast/plink-plonk/id1567451501?i=1000548692010

EP 4 - INTERVIEW: Bergrún Snæbjörnsdóttir
Podcast Episode · plink plonk · January 22, 2022 · 1h 31m

Cheeger Inequalities for the Persistent Laplacian
Magnus Bakke Botnan, Rui Dong
https://arxiv.org/abs/2606.02846 https://arxiv.org/pdf/2606.02846 https://arxiv.org/html/2606.02846
arXiv:2606.02846v1 Announce Type: new
Abstract: We study Cheeger-type inequalities for persistent Laplacians associated with inclusions of simplicial complexes $\mathcal{K}\hookrightarrow \mathcal{L}$. We introduce a persistent up $p$-Laplacian $\Delta_{q,p,\mathrm{up}}^{\mathcal{K},\mathcal{L}}$ for $p\geq 1$. For $p=2$, this recovers the usual persistent up Laplacian, while for $p=1$ it yields a nonzero persistent Cheeger constant $\varphi_q^{\mathcal{K},\mathcal{L}}$. We prove a Cheeger-type inequality relating $\varphi_q^{\mathcal{K},\mathcal{L}}$ to the smallest nonzero eigenvalue of $\Delta_{q,\mathrm{up}}^{\mathcal{K},\mathcal{L}}$. This gives a persistent extension of recent work by Jost and Zhang (Ann. Sc. Norm. Super. Pisa Cl. Sci., 2024; arXiv:2302.01069).
We then study two more structured settings. Under a locally complete $q$-skeleton assumption on $\mathcal{K}$, we extend the complete-skeleton isoperimetric inequality of Parzanchevski--Rosenthal--Tessler (Combinatorica, 2016; arXiv:1207.0638) to the persistent setting. For orientable $(q 1)$-dimensional pseudomanifolds, we prove a Kron-type reduction of the persistent up Laplacian to a vertex- and edge-weighted graph Laplacian, possibly with Dirichlet boundary terms, and obtain two-sided Cheeger inequalities; this is related to the dual-graph perspective in the work of Steenbergen--Klivans--Mukherjee (Adv. Appl. Math., 2014; arXiv:1209.5091). We also describe the nonzero persistent Cheeger constant $\varphi_q^{\mathcal{K},\mathcal{L}}$ explicitly in terms of the dual graph in the non-branching pseudomanifold case. Finally, for graph inclusions $H\hookrightarrow G$, we compare the persistent Cheeger constants introduced here with the Kron-reduction Cheeger constants of M\'emoli et al. (SIAM J. Math. Data Sci., 2022; arXiv:2012.02808).
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