2 papers
astro-ph.SR2026
White dwarfs within 13 pc: Insights from ultraviolet spectroscopy
Mairi W. O'Brien, Pier-Emmanuel Tremblay, Boris T. Gaensicke +9
We present a comprehensive multi-wavelength spectroscopic and photometric analysis of the 44 confirmed white dwarfs within 13 pc of the Sun. Combining flux-calibrated ultraviolet (…
math.LO2026
Some model theory of the Heisenberg group
Maciej FrÄ cek, Piotr Kowalski
We show that a field is model complete (in the language of rings) if and only if the Heisenberg group is model complete (in the language of groups). To show that, we ext…