Search Results - "Fernando, José F."

Positive Semidefinite Analytic Functions on Real Analytic Surfaces by Fernando, José F.

“…Let X ⊂ R n be a (global) real analytic surface. Then every positive semidefinite meromorphic function on X is a sum of 10 squares of meromorphic functions on…”
Get full text

Rings of differentiable semialgebraic functions by Baro, E., Fernando, José F., Gamboa, J. M.

“…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 on…”
Get full text

Representation of positive semidefinite elements as sum of squares in 2-dimensional local rings by Fernando, José F.

“…A classical problem in real geometry concerns the representation of positive semidefinite elements of a ring A as sums of squares of elements of A . If A is an…”
Get full text

On the set of local extrema of a subanalytic function by Fernando, José F.

“…Let F be a category of subanalytic subsets of real analytic manifolds that is closed under basic set-theoretical operations (locally finite unions, difference…”
Get full text

Differentiable approximation of continuous semialgebraic maps by Fernando, José F., Ghiloni, Riccardo

“…In this work we approach the problem of approximating uniformly continuous semialgebraic maps f : S → T from a compact semialgebraic set S to an arbitrary…”
Get full text

Normalization of Complex Analytic Spaces from a Global Viewpoint by Acquistapace, Francesca, Broglia, Fabrizio, Fernando, José F.

“…In this work, we study some algebraic and topological properties of the ring of global analytic functions on the normalization of a reduced complex analytic…”
Get full text

On globally defined semianalytic sets by Acquistapace, Francesca, Broglia, Fabrizio, Fernando, José F.

“…In this work we present the concept of C-semianalytic subset of a real analytic manifold and more generally of a real analytic space. C -semianalytic sets can…”
Get full text

Moral Hazard, Risk Sharing, and the Optimal Pool Size by von Bieberstein, Frauke, Feess, Eberhard, Fernando, José F., Kerzenmacher, Florian, Schiller, Jörg

“…We examine the optimal size of risk pools with moral hazard. In risk pools, the effective share of the own loss borne is the sum of the direct share (the…”
Get full text

On regulous and regular images of Euclidean spaces by Fernando, José F, Fichou, Goulwen, Quarez, Ronan, Ueno, Carlos

Get full text

Complements of Unbounded Convex Polyhedra as Polynomial Images of $${{\mathbb {R}}}^n$$ R n by Fernando, José F., Ueno, Carlos

Get full text

A short proof for the open quadrant problem by Fernando, José F., Ueno, Carlos

“…In 2003 it was proved that the open quadrant Q:={x>0,y>0} of R2 is a polynomial image of R2. This result was the origin of an ulterior more systematic study of…”
Get full text

On the Nullstellensätze for Stein spaces and C-analytic sets by Acquistapace, Francesca, Broglia, Fabrizio, Fernando, José F.

“…In this work we prove the real Nullstellensatz for the ring 𝒪(X) of analytic functions on a C-analytic set X ⊂ ℝ n in terms of the saturation of Łojasiewicz's…”
Get full text

Construction and analysis of a human testis/sperm-enriched interaction network: Unraveling the PPP1CC2 interactome by Silva, Joana Vieira, Yoon, Sooyeon, De Bock, Pieter-Jan, Goltsev, Alexander V., Gevaert, Kris, Mendes, José Fernando F., Fardilha, Margarida

“…Phosphoprotein phosphatase 1 catalytic subunit gamma 2 (PPP1CC2), a PPP1CC tissue-specific alternative splice restricted to testicular germ cells and…”
Get full text

On the Set of Points at Infinity of a Polynomial Image of $${\mathbb R}^n$$ R n by Fernando, José F., Ueno, Carlos

Get full text

Amyloid precursor protein interaction network in human testis: sentinel proteins for male reproduction by Silva, Joana Vieira, Yoon, Sooyeon, Domingues, Sara, Guimarães, Sofia, Goltsev, Alexander V, da Cruz E Silva, Edgar Figueiredo, Mendes, José Fernando F, da Cruz E Silva, Odete Abreu Beirão, Fardilha, Margarida

“…Amyloid precursor protein (APP) is widely recognized for playing a central role in Alzheimer's disease pathogenesis. Although APP is expressed in several…”
Get full text

On Complements of Convex Polyhedra as Polynomial and Regular Images of ℝn by Fernando, José F., Ueno, Carlos

Get full text

Sums of squares in real rings by Fernando, José F., Ruiz, Jesús M., Scheiderer, Claus

“…Let A be an excellent ring. We show that if the real dimension of A is at least three then A has infinite Pythagoras number, and there exists a positive…”
Get full text

Sums of squares in real analytic rings by Fernando, José F.

“…Let A be an analytic ring. We show: (1) A has finite Pythagoras number if and only if its real dimension is \leq 2, and (2) if every positive semidefinite…”
Get full text

Surjective Nash maps between semialgebraic sets by Carbone, Antonio, Fernando, José F.

“…In this work we study the existence of surjective Nash maps between two given semialgebraic sets S and T. Some key ingredients are: the irreducible components…”
Get full text

On the irreducible components of globally defined semianalytic sets by Fernando, José F.

“…In this work we present the concept of amenable C - semianalytic subset of a real analytic manifold M and study the main properties of this type of sets…”
Get full text