2 papers
astro-ph.HE2026
Cosmic-Ray Spectra and Metal Budget Regulated by the Galactic Wind
Yusaku Fukumoto, Katsuaki Asano, Jiro Shimoda
We study the advection effect of the Galactic wind on the local cosmic ray spectra. The spectral hardening from a few hundred GV and softening from a few TV are reproduced by a vel…
math.LO2025
Nonstandard Witnesses and Observational Barriers for Π0_1 Sentences in ZFC: Standard Cuts, Uniform Reflection Failure, and the Semantic Void
Yusei Fukumoto
We isolate a model-theoretic "standard-cut" phenomenon for true Pi0_1 sentences: if a model M satisfies ZFC + not-phi, then omega^M is not the standard omega, and any internal "wit…