3 papers
math.QA2025
On the uniqueness of Yangians
Sachin Gautam, Curtis Wendlandt, Siwei Xu
Let be a simple Lie algebra over the complex numbers, and let denote its polynomial current algebra. In the mid-1980s, Drinfeld introduced the Yang…
gr-qc2025
Accretion of the degenerate Fermi gas onto a Reissner-Nordström black hole
Ping Li, Jiang-he Yang, Siwei Xu
We extend the Rioseco and Sarbach model into Reissner-Nordström black hole accretes degenerate relativistic Fermi gas. The accretion theory is based on the Boyer-Lindquist coordin…
gr-qc2024
Analytical calculation of Kerr and Kerr-Ads black holes in theory
Ping Li, Yong-qiang Liu, Jiang-he Yang +2
In this paper, we extend Chandrasekhar's method of calculating rotating black holes into theory. We consider the Ricci scalar is a constant and derive the Kerr and Kerr-Ads…