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Isoperimetric Bounds for Weighted Steklov Eigenvalues with Radial Weights
Friedemann Brock, Francesco Chiacchio
https://arxiv.org/abs/2510.12631 https://ar…

Isoperimetric Bounds for Weighted Steklov Eigenvalues with Radial Weights
We study the following class of Steklov eigenvalue problems: \[ \nabla \cdot \bigl( w \nabla u \bigr) = 0 \quad \text{in } Ω, \qquad \frac{\partial u}{\partial ν} = γv u \quad \text{on } \partial Ω, \] where $w$ and $v$ are prescribed positive radial functions, $Ω$ is a Lipschitz domain in $\mathbb{R}^N$ with $N \geq 2$ and $ν$ denotes its outward unit normal. Extending classical results in the unweighted case due to Weinstock, the first author, and others, we establish isoperimetric ineq…

Lord help me I'm starting to enjoy coding in C .
I find myself saying "if you're writing *that* kind of C you've done something wrong at the design stage"
I caught myself feeling grateful that the language punishes you with unreadability and untestability when you do too much in one function
Is this... Stockholm Syndrome?

@… following up on our chat at #SDSL2025, I finally found some time to see how a #QGIS Processing Algorithm Provider plugin can be unit tested. Here's what I've …

trajectools/tests/test_run_algs.py at main
trajectools - Trajectools - trajectory data analysis tools for the QGIS Processing toolbox | Previous home: https://github.com/movingpandas/qgis-trajectools

Spotify says founder Daniel Ek will become Executive Chairman effective January 1, 2026, replaced by CPTO Gustav Söderström and CBO Alex Norström as co-CEOs (Spotify)
https://newsroom.spotify.com/2025-09-30/spotify-announcement-daniel-ek-executive-c…

Spotify Announces Leadership Evolution: Daniel Ek to Become Executive Chairman, Alex Norström and Gustav Söderström to Become Co-CEOs in January 2026 — Spotify
The following press release went live on Business Wire earlier today. You can also find more detail here in Founder & CEO Daniel Ek’s letter to employees. Stockholm and New York — 30 September, 2025 Today, Spotify (NYSE: SPOT) announced that Founder and Chief Executive Officer Daniel Ek will transition to the role of Executive...

Spotify says founder Daniel Ek will become Executive Chairman effective January 1, 2026, replaced by CPTO Gustav Söderström and CBO Alex Norström as co-CEOs (Spotify)
https://newsroom.spotify.com/2025-09-30/spotify-announcement-daniel-ek-executive-c…

Spotify Announces Leadership Evolution: Daniel Ek to Become Executive Chairman, Alex Norström and Gustav Söderström to Become Co-CEOs in January 2026 — Spotify
The following press release went live on Business Wire earlier today. You can also find more detail here in Founder & CEO Daniel Ek’s letter to employees. Stockholm and New York — 30 September, 2025 Today, Spotify (NYSE: SPOT) announced that Founder and Chief Executive Officer Daniel Ek will transition to the role of Executive...

MEGATRON: Reproducing the Diversity of High-Redshift Galaxy Spectra with Cosmological Radiation Hydrodynamics Simulations
Harley Katz, Martin P. Rey, Corentin Cadiou, Oscar Agertz, Jeremy Blaizot, Alex J. Cameron, Nicholas Choustikov, Julien Devriendt, Uliana Hauk, Gareth C. Jones, Taysun Kimm, Isaac Laseter, Sergio Martin-Alvarez, Kosei Matsumoto, Autumn Pearce, Francisco Rodr\'iguez Montero, Joki Rosdahl, Mahsa Sanati, Aayush Saxena, Adrianne Slyz, Richard Stiskalek, Anatole Stor…

MEGATRON: Reproducing the Diversity of High-Redshift Galaxy Spectra with Cosmological Radiation Hydrodynamics Simulations
We present the MEGATRON suite of cosmological radiation hydrodynamics simulations following the formation of Milky Way-mass galaxies from the earliest cosmic epochs when Population III stars form to Cosmic Noon. The suite represents the first set of cosmological simulations that couples a vast non-equilibrium thermochemistry network of primordial species, metals, and molecules to multifrequency, on-the-fly radiation transport, allowing us to directly predict the spectral properties of early gal…

Strategic Pricing and Ranking in Recommendation Systems with Seller Competition
Tushar Shankar Walunj, Veeraruna Kavitha, Jayakrishnan Nair, Priyank Agarwal
https://arxiv.org/abs/2509.13462

Strategic Pricing and Ranking in Recommendation Systems with Seller Competition
We study a recommendation system where sellers compete for visibility by strategically offering commissions to a platform that optimally curates a ranked menu of items and their respective prices for each customer. Customers interact sequentially with the menu following a cascade click model, and their purchase decisions are influenced by price sensitivity and positions of various items in the menu. We model the seller-platform interaction as a Stackelberg game with sellers as leaders and consi…