J. M. Gamboa

collaborators

2 papers

math.AG2019

Rings of differentiable semialgebraic functions

E. Baro, José F. Fernando, J. M. Gamboa

In this work we analyze the main properties of the Zariski and maximal spectra of the ring $S^{r} (M)$ of differentiable semialgebraic functions of class $C^{r}$ o…

math.AG2015

The open quadrant problem: A topological proof

Jose F. Fernando, J. M. Gamboa, Carlos Ueno

In this work we present a new polynomial map $f := (f_{1}, f_{2}) : R^{2} \to R^{2}$ whose image is the open quadrant ${x > 0, y > 0} \subset R^{2}$ . The proof of this fact…