Tootfinder

Substructural Abstract Syntax with Variable Binding and Single-Variable Substitution
Marcelo Fiore, Sanjiv Ranchod
https://arxiv.org/abs/2505.24812 https:/…

Substructural Abstract Syntax with Variable Binding and Single-Variable Substitution
We develop a unified categorical theory of substructural abstract syntax with variable binding and single-variable (capture-avoiding) substitution. This is done for the gamut of context structural rules given by exchange (linear theory) with weakening (affine theory) or with contraction (relevant theory) and with both (cartesian theory). Specifically, in all four scenarios, we uniformly: define abstract syntax with variable binding as free algebras for binding-signature endofunctors over variab…

The Big Ugly Bill taken down by a republican from Texas.
https://substack.com/@demwinsmedia/note/c-131424537?r=8k45f&utm_medium=ios&utm_source=notes-share-action

Democratic Wins Media on Substack
BREAKING: Texas State Rep. James Talarico just took down Donald Trump’s Big, Ugly bill in a way we didn’t think was possible. This is incredible.

"tough on crime" ruins lives and doesn't make us safe.
https://missionlocal.org/2025/07/sf-teen-defendant-substance-treatment-alternative-prison-sentence/

A 19-year-old in S.F. treatment program passed some notes. Now, he faces years in prison.
SF aims to both get tougher on crime and put recovery first. How many second chances should a teenage defendant with addiction issues get?

Model-Guided Network with Cluster-Based Operators for Spatio-Spectral Super-Resolution
Ivan Pereira-S\'anchez, Julia Navarro, Ana Bel\'en Petro, Joan Duran
https://arxiv.org/abs/2505.24605

Model-Guided Network with Cluster-Based Operators for Spatio-Spectral Super-Resolution
This paper addresses the problem of reconstructing a high-resolution hyperspectral image from a low-resolution multispectral observation. While spatial super-resolution and spectral super-resolution have been extensively studied, joint spatio-spectral super-resolution remains relatively explored. We propose an end-to-end model-driven framework that explicitly decomposes the joint spatio-spectral super-resolution problem into spatial super-resolution, spectral super-resolution and fusion tasks. …

(1/2) Can you trust what you hear? 🎧 Episode 344 of the EdTech Situation Room (from 15 Jan 2025) explores AI voice tech, misinformation, and media ethics in the digital age.
on Substack:
https://open.substack.com/p…

Diversity of Cold Worlds: A Near Complete Spectral Energy Distribution for 2MASS J04151954-0935066 using JWST
Sherelyn Alejandro Merchan, Jacqueline K. Faherty, Genaro Su\'arez, Kelle L. Cruz, Adam J. Burgasser, Jonathan Gagn\'e, Callie E. Hood, Eileen C. Gonzales, Daniella C. Bardalez Gagliuffi, Jolie L'Heureux, Johanna M. Vos, Adam C. Schneider, Aaron M. Meisner, Caroline Morley, J. Davy Kirkpatrick, Federico Marocco, Rocio Kiman, Charles A. Beichman, Ben Burningham, Dan …

Diversity of Cold Worlds: A Near Complete Spectral Energy Distribution for 2MASS J04151954-0935066 using JWST
We present the a near complete spectral energy distribution (SED) for an extrasolar world: the T8 brown dwarf 2MASS~J04151954$-$0935066. Spanning from optical to mid-infrared (0.7--20.4 micron) wavelengths, the SED for this substellar atmosphere is constructed from new JWST NIRSpec G395H ($R\sim$2700) and Magellan FIRE echelle ($R\sim$8000) near-infrared spectra, along with MIRI mid-infrared photometry complemented by spectra from Keck I, IRTF, Magellan, AKARI, Spitzer and photometry from vario…

Applying Vision Transformers on Spectral Analysis of Astronomical Objects
Luis Felipe Strano Moraes, Ignacio Becker, Pavlos Protopapas, Guillermo Cabrera-Vives
https://arxiv.org/abs/2506.00294

Applying Vision Transformers on Spectral Analysis of Astronomical Objects
We apply pre-trained Vision Transformers (ViTs), originally developed for image recognition, to the analysis of astronomical spectral data. By converting traditional one-dimensional spectra into two-dimensional image representations, we enable ViTs to capture both local and global spectral features through spatial self-attention. We fine-tune a ViT pretrained on ImageNet using millions of spectra from the SDSS and LAMOST surveys, represented as spectral plots. Our model is evaluated on key task…

What is practice?
Practice is like a keel—deep contact with the self helps you not be blown around by every wind. Attentively returning to yourself for a period of time every day can be like coming home.
https://salrandolph.substack.com/p/ways-of-seeing-practice…

Minimum Selective Subset on Some Graph Classes
Bubai Manna
https://arxiv.org/abs/2507.00235 https://arxiv.org/pdf/2507.00235

Minimum Selective Subset on Some Graph Classes
In a connected simple graph G = (V(G),E(G)), each vertex is assigned a color from the set of colors C={1, 2,..., c}. The set of vertices V(G) is partitioned as V_1, V_2, ... ,V_c, where all vertices in V_j share the same color j. A subset S of V(G) is called Selective Subset if, for every vertex v in V(G), and if v is in V_j, at least one of its nearest neighbors in (S union (V(G)\ V_j)) has the same color as v. The Minimum Selective Subset (MSS) problem seeks to find a selective subset of mini…

This https://arxiv.org/abs/2503.19322 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A 1.48-2.48 $\mathrmμ$m R=28000 spectroscopic atlas of the L7.5 and T0.5 components of the nearest pair of brown dwarfs: Luhman 16AB
We present a high signal-to-noise (SNR $\sim$ 450), high-dispersion ($R \equiv λ/ Δλ\sim 28\,000$) H- and K-band spectroscopic atlas of the L7.5 and T0.5 components of the Luhman 16AB binary (WISE J104915.57$-$531906.1AB): the closest pair of brown dwarfs, and one of the best substellar benchmarks. The spectra were combined from a 70-day spectroscopic monitoring campaign of the binary with IGRINS on Gemini South. We fit model photospheres to the combined high-quality spectra to estimate atmo…