Tootfinder

Rota-Baxter operators on compact simple Lie groups and algebras
Saveliy V. Skresanov
https://arxiv.org/abs/2506.14324 https://arxiv.o…

Rota-Baxter operators on compact simple Lie groups and algebras
A Rota-Baxter operator on a Lie group $ G $ is a smooth map $ B : G \to G $ such that $ B(g)B(h) = B(gB(g)hB(g)^{-1}) $ for all $ g, h \in G $. This concept was introduced in 2021 by Guo, Lang and Sheng as a Lie group analogue of Rota-Baxter operators of weight 1 on Lie algebras. We show that the only Rota-Baxter operators on compact simple Lie groups are the trivial map and the inverse map. A similar description for Rota-Baxter operators of weight 1 on compact simple Lie algebras is provided.

Source: Chime's IPO is expected to price at ~$11B, down from its $25B private valuation in 2021; every VC-backed IPO in the past 12 months has been a down round (Cory Weinberg/The Information)
https://www.theinformation.com/articles/every-vc-ba…

Every VC-Backed IPO in the Past 12 Months Has Been a Down Round
When banking app Chime goes public next month, it will mark the eighth straight venture capital–backed initial public offering in the past 12 months to be valued less than it was in private fundraising rounds. Chime, for instance, was valued at $25 billion in 2021, but its bankers have been ...

To buy or not to buy: deterministic rent-or-buy problems on node-weighted graphs
Sander Borst, Moritz Venzin
https://arxiv.org/abs/2507.08698 https://

To buy or not to buy: deterministic rent-or-buy problems on node-weighted graphs
We study the rent-or-buy variant of the online Steiner forest problem on node- and edge-weighted graphs. For $n$-node graphs with at most $\bar{n}$ non-zero node-weights, and at most $\tilde{k}$ different arriving terminal pairs, we obtain a deterministic, $O(\log n \log \bar{n})$-competitive algorithm. This improves on the previous best, $O(\log^4 n)$-competitive algorithm obtained by the black-box reduction from (Bartal et al. 2021) combined with the previously best deterministic algorithms f…

So You Want To Be A Copywriter With Bernadette Schwerdt
Great Australian Pods Podcast Directory: https://www.greataustralianpods.com/so-you-want-to-be-a-copywriter-with-bernadette-schwerdt/

So You Want To Be A Copywriter | Great Australian Pods Podcast Directory
Podcast: So You Want To Be A Copywriter With Bernadette Schwerdt Host: Bernadette Schwerdt Category: Business Sub-Category: Careers, How To, Marketing & Social Media First Episode: 2021 Join Australia’…

ThinkBroadband: 78% of UK properties have access to full-fiber broadband, up from 12% in Jan. 2020, which experts credit to Ofcom's 2021 pro-competition push (Financial Times)

Ammonia, Methane, Hydrogen and Methanol Produced in Remote Renewable Energy Hubs: a Comparative Quantitative Analysis
Antoine Larbanois, Victor Dachet, Antoine Dubois, Rapha\"el Fonteneau, Damien Ernst
https://arxiv.org/abs/2507.07681

Ammonia, Methane, Hydrogen and Methanol Produced in Remote Renewable Energy Hubs: a Comparative Quantitative Analysis
Remote renewable energy hubs (RREHs) for synthetic fuel production are engineering systems harvesting renewable energy where it is particularly abundant. They produce transportable synthetic fuels for export to distant load centers. This article aims to evaluate the production costs of different energy carriers, and includes a discussion on advantages and disadvantages in terms of technical performance. To do so, we extend the study of Berger et al., (2021) which focuses on methane (CH4) as ene…

Improved Binary Black Hole Search Discriminator from the Singular Value Decomposition of Non-Gaussian Noise Transients
Tathagata Ghosh, Sukanta Bose, Sanjeev Dhurandhar, Sunil Choudhary
https://arxiv.org/abs/2507.04628

Improved Binary Black Hole Search Discriminator from the Singular Value Decomposition of Non-Gaussian Noise Transients
The sensitivity of current gravitational wave (GW) detectors to transient GW signals is severely affected by a variety of non-Gaussian and non-stationary noise transients, such as the blip and tomte "glitches". These glitches share some time-frequency resemblance with GW signals from massive binary black holes. In earlier works [Joshi et al., Phys. Rev. D 103, 044035 (2021); Choudhary et al., Phys. Rev. D 110, 044051 (2024)], the authors presented a method for constructing a $χ^2$-distributed …

Bravo Bravo Effing Bravo
Great Australian Pods Podcast Directory: #GreatAusPods

Bravo Bravo Effing Bravo | Great Australian Pods Podcast Directory
Podcast: Bravo Bravo Effing Bravo Hosts: Nathan and Mariana Category: TV & Movies Sub-Category: After Shows & Reality TV First Episode: 2021 Bravo Bravo Effing Bravo is a place where you can hear no…

Note on the interpretation of magnetic diffraction in NdAlSi: helical or fan?
Takashi Kurumaji
https://arxiv.org/abs/2506.04000 https://

Note on the interpretation of magnetic diffraction in NdAlSi: helical or fan?
We revisit the magnetic structure analysis reported in Nat. Mater. 20, 1650 (2021), which concluded that a Weyl semimetal candidate NdAlSi hosts a helical magnetic order. This conclusion was based on magnetic neutron diffraction peaks corresponding to modulation vectors $\vec{k}_{in} = (1/3, 1/3, 0)$ and $\vec{k}_{out} = (2/3, 2/3, 0)$, attributed to in-plane and out-of-plane components of the magnetic moments, respectively. Upon careful reanalysis, we suggest that a fan-type magnetic structure…

I'm giving away some technical #books, preferably around #Osona / #Vic , but any #Catalonia town around the R3 line down to #Barcelona is also ok. I don't have a car and I'd prefer not having to package and send them.
The publisher made some mistakes so I have duplicates, the ones I'm giving away:
- Math for Security
- The Shape of Data
- Statistics Done Wrong
- The Rust Programming Language (2021 Edition)
I'd also prefer giving it to people who can't afford buying expensive books often, for economical fairness reasons.
⁨#Giveaway⁩ ⁨#donation⁩ #bookstodon #freebooks