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Geometry of integers revisited

, 2019
We study geometry of the ring of algebraic integers $O_K$ of a number field $K$. Namely, it is proved that the inclusion $\mathbf{Z}\subset O_K$ defines a covering of the Riemann sphere $\mathbf{C}P^1$ ramified over three points $\{0,1,\infty\}$.
Nikolaev, Igor
core  

Clinical Performance and Safety of 108 SpineJack Implantations: 1-Year Results of a Prospective Multicentre Single-Arm Registry Study. [PDF]

Biomed Res Int, 2015
Noriega D, Maestretti G, Renaud C, Francaviglia N, Ould-Slimane M, Queinnec S, Ekkerlein H, Hassel F, Gumpert R, Sabatier P, Huet H, Plasencia M, Theumann N, Kunsky A, Krüger A.   +14 more
europepmc   +1 more source