Tootfinder

from my link log —
Writing a C compiler.
https://norasandler.com/2022/03/29/Write-a-C-Compiler-the-Book.html
saved 2025-06-11

On the Maximum Spread of Directed Graphs
Susie Lu, John Urschel
https://arxiv.org/abs/2508.05760 https://arxiv.org/pdf/2508.05760

On the Maximum Spread of Directed Graphs
Given a directed graph $G$, the spread of $G$ is the largest distance between any two eigenvalues of its adjacency matrix. In 2022, Breen, Riasanovsky, Tait, and Urschel asked what $n$-vertex directed graph maximizes spread, and whether this graph is undirected. We prove the more general result that the spread of any $n \times n$ non-negative matrix $A$ with $\|A\|_{\max} \le 1$ is at most $2n/\sqrt{3}$, which is tight up to an additive factor and exact when $n$ is a multiple of three…

Just wrote two more ministers with the request to vote AGAINS #chatcontrol .
Imagine a world where antidemocratics gain power—and want to “cleanse” the country. What better tool than access to all private chats?
My grandma experienced denunciations during WW2. I don’t want to relive that. And backdoors can and WILL be exploited by enemies of the country.
And once it's …

Die Chatkontrolle ist wieder da und wir haben nur noch ein paar Wochen, um die EU-Pläne für CSAM-Scans zu stoppen. | Tuta
Die EU-Verordnung zur Verhütung und Bekämpfung von sexuellem Kindesmissbrauch, die erstmals im Mai 2022 veröffentlicht wurde, ist zum "meistkritisierten Gesetz aller Zeiten" geworden. Hier erfahren Sie, wie Sie es jetzt stoppen können!

PitchBook: Nvidia invested in 59 AI startups in 2025 so far, including 10 in the past two months, surpassing 55 investments in 2024 and 12 investments in 2022 (Emily Forgash/Bloomberg)
https://www.bloomberg.com/news/articles/2025-10-29…

📸 Mémoire du 14 juin 2018
Sept ans ont passé depuis ce post.
Et pourtant, la justice n’a toujours pas terminé son travail.
En Belgique, le jugement définitif est tombé en 2022. Mais en 2025, certaines indemnisations sont encore bloquées. Des victimes attendent toujours que leur souffrance soit reconnue dans les faits, pas seulement dans les mots.
En France, l’affaire OKC/Spatz a été relancée en 2017, réouverte officiellement en 2021. Et aujourd’hui ? Toujours aucune mis…

My fediversary is also November 2022, not sure what day. But these three years have been excellent- here's to many more. And it's all you cool folks who make it so great to be here, so thank you all for that. 💥
#fediverse #fediversary

Jährlicher Zubau und Rückbau von #Balkonsolarleistung in Deutschland mit Stand vom 05.09.2025.
Unplausible Inbetriebnahmedaten von 1900 bis 2017 wurden durch das Registrierungsdatum der #Steckersolaranlage ersetzt.
👉 Zusatzlesestoff: Förderantrag

Time For 9 o'clock #HashTagGames hosted by @… Let's play!
#RejectedBookEdits

at_migrations: Austrian internal migrations (2002-2022)
A network of migrations between municipalities in Austria, from 2002 to 2022. A weighted directed link from source to target indicates a migration flow from these two municipalities. Edges are annotated with migration volume (number of people), nationality, sex, and year.
This network has 2115 nodes and 2908569 edges.
Tags: Social, Economic, Travel, Weighted, Politlcal, Timestamps, Metadata

såg ofta butterfly på lekplatserna när jag var föräldraledig, lite för ofta skulle jag säga, extremt ofta, deras ekonomiska strategi verkar vara att använda kommunens offentliga lekplatser som avlastningsyta för att slippa betala för egna lokaler, vilket tär på våra gemensamma resurser, glad att de inte får nytt tillstånd www.mitti.se/nyheter/nej-till-privat-forskola-i-ragsved-6.3.325639.9606f7a3e2
EDIT: Se bild, det funkar!

What Aidan Hutchinson's extension means, and which pass rushers are getting paid next https://www.espn.com/nfl/story/_/id/46771114/aidan-hutchinson-contract-extension-detroit-lions-nfl-pass-rushers

Nvidia opens at a $5T market cap, becoming the first company to hit the milestone, climbing 5% in early trading; NVDA is up 50% in 2025 and 1,275% since 2022 (Financial Times)
https://www.ft.com/content/62933c70-261c-4b7a-a045-3f9f9cceccd7

From #HannahFry @fryrsquared@instagram.com
🥰Your feel good research of the day:
Gentle as a mother's touch: C-tactile touch promotes autonomic regulation in preterm infants by I Püschel, J Reichert, Y Friedrich, J Bergander, K Weidner, I Croy (2022).
#Ctactile

Time For 9 o'clock #HashTagGames hosted by @… Let's play!
#ClosingTimeASongOrPoem

Bundesanwaltschaft meldet Festnahme von mutmaßlichem Nord-Stream-Angreifer
Die Bundesanwaltschaft hat in Italien einen Ukrainer festnehmen lassen, der im September 2022 an der Sabotage der Nord-Stream-Pipelines beteiligt gewesen sein soll. Der Beschuldigte sei mutmaßlich einer der Koordinatoren der Aktion, erklärte die Behörde in Karlsruhe. Er soll nach einer Überstellung aus Italien dem Ermittlungs…
🔗

Bundesanwaltschaft: Festnahme nach Anschlag auf Nord-Stream-Pipelines
Die Bundesanwaltschaft hat in Italien einen Ukrainer festnehmen lassen, der an der Sprengung der Nord-Stream-Pipelines beteiligt gewesen sein soll. Der Beschuldigte sei einer der Koordinatoren der Operation, hieß es.

Weak Nearly $\mathcal S$- and Weak Nearly $\mathcal C$- Manifolds
Vladimir Rovenski
https://arxiv.org/abs/2508.17755 https://arxiv.org/pdf/2508.17755

Weak Nearly $\mathcal S$- and Weak Nearly $\mathcal C$- Manifolds
The recent interest of geometers in the $f$-structures of K. Yano (1961) is motivated by the study of the dynamics of contact foliations, as well as their applications in theoretical physics. Weak metric $f$-structures on a smooth manifold, introduced by of the author and R. Wolak (2022), open a new perspective on the theory of classical structures. In the paper, we define structures of this kind, called weak nearly ${\cal S}$- and weak nearly ${\cal C}$- structures, study their geometry, e.g. …

Lions agree to terms with DE Aidan Hutchinson on four-year extension https://www.nfl.com/news/lions-aidan-hutchinson-four-year-extension

Anzahl der errichteten #Balkonkraftwerke pro Jahr in #Deutschland mit Stand vom 29.08.2025.
Unplausible Inbetriebnahmedaten von 1900 bis 2017 wurden durch das Registrierungsdatum der #Steckersolaranlage

Apparently #Spotify is #Fascist. Wow, big surprise from the app that’s allergic to paying artists. Always has been, comrade, and I migrated to #Bandcamp in early 2022 before they started servi…

On the Structural Parameterizations of 2-Club with Triangle Constraints
Ashwin Jacob, Diptapriyo Majumdar, Raghav Sakhuja
https://arxiv.org/abs/2509.16143 https://

On the Structural Parameterizations of 2-Club with Triangle Constraints
Given an undirected graph G = (V, E) and an integer k, the s-Club asks if Gcontains a vertex subset S of at least k vertices such that G[S] has diameter at most s. Recently, Vertex r-Triangle s-Club, and Edge r-Triangle s-Club that generalize the notion of s-Club have been studied by Garvardt et al. [TOCS-2023, IWOCA-2022] from the perspective of parameterized complexity. Given a graph G and an integer k, the Vertex r-Triangle s-Club asks if there is an s-Club S with at least k vertices such th…

✅ Wrote to two of our ministers to vote against chat control.
More to come the next days.
Imagine a world where some non-democratic party gets more and more votes. Parties who want to "clean" the country. Which tool would be more worthy than having access to private conversations.
please vote for our freedom
please vote agains chatcontrol
Just drop them an email! It's just an email! Not even 5 minutes of your time.

Die Chatkontrolle ist wieder da und wir haben nur noch ein paar Wochen, um die EU-Pläne für CSAM-Scans zu stoppen. | Tuta
Die EU-Verordnung zur Verhütung und Bekämpfung von sexuellem Kindesmissbrauch, die erstmals im Mai 2022 veröffentlicht wurde, ist zum "meistkritisierten Gesetz aller Zeiten" geworden. Hier erfahren Sie, wie Sie es jetzt stoppen können!

Time For 9 o'clock #HashTagGames hosted by @… Let's play!
#UnreadBookASong

Die Orks haben anscheinend wieder einen Helden erwischt: https://www.tagesschau.de/eilmeldung/eilmeldung-8808.html

Climate change: across time and frequencies
Luis Aguiar-Conraria, Vasco J. Gabriel, Luis F. Martins, Anthoulla Phella
https://arxiv.org/abs/2509.21334 https://

Climate change: across time and frequencies
We use continuous wavelet tools to characterize the dynamics of climate change across time and frequencies. This approach allows us to capture the changing patterns in the relationship between global mean temperature anomalies and climate forcings. Using historical data from 1850 to 2022, we find that greenhouse gases, and CO$_2$ in particular, play a significant role in driving the very low frequency trending behaviour in temperatures, even after controlling for the effects of natural forcings…

An analysis of the effects of open science indicators on citations in the French Open Science Monitor
Giovanni Colavizza, Lauren Cadwallader, Iain Hrynaszkiewicz
https://arxiv.org/abs/2508.20747

An analysis of the effects of open science indicators on citations in the French Open Science Monitor
This study investigates the correlation of citation impact with various open science indicators (OSI) within the French Open Science Monitor (FOSM), a dataset comprising approximately 900,000 publications authored by French authors from 2020 to 2022. By integrating data from OpenAlex and Crossref, we analyze open science indicators such as the presence of a pre-print, data sharing, and software sharing in 576,537 publications in the FOSM dataset. Our analysis reveals a positive correlation betw…

Mineral Detection of Neutrinos and Dark Matter 2025 Proceedings
Shigenobu Hirose, Patrick Stengel, Natsue Abe, Daniel Ang, Lorenzo Apollonio, Gabriela R. Araujo, Yoshihiro Asahara, Laura Baudis, Pranshu Bhaumik, Nathaniel Bowden, Joseph Bramante, Lorenzo Caccianiga, Mason Camp, Qing Chang, Jordan Chapman, Reza Ebadi, Alexey Elykov, Anna Erickson, Valentin Fondement, Katherine Freese, Shota Futamura, Claudio Galelli, Andrew Gilpin, Takeshi Hanyu, Noriko Hasebe, Adam A. Hecht, Samuel C. …

Mineral Detection of Neutrinos and Dark Matter 2025 Proceedings
The third ``Mineral Detection of Neutrinos and Dark Matter'' (MD$ν$DM'25) meeting was held May 20-23, 2025 in Yokohama, Japan, hosted by the Yokohama Institute for Earth Sciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC). These proceedings compile contributions from the workshop and update the progress of mineral detector research. MD$ν$DM'25 was the third such meeting, following the first in October of 2022 held at the IFPU in Trieste, Italy and the second in January of…