On polynomial images of a closed ball

JF Fernando, C Ueno - Journal of the Mathematical Society of Japan, 2023 - jstage.jst.go.jp
In this work we approach the problem of determining which (compact) semialgebraic
subsets of Rn are images under polynomial maps f: Rm→ Rn of the closed unit ball Bm …

[HTML][HTML] Surjective Nash maps between semialgebraic sets

A Carbone, JF Fernando - Advances in Mathematics, 2024 - Elsevier
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 S i⁎ of S …

[HTML][HTML] On the one dimensional polynomial and regular images of Rn

JF Fernando - Journal of Pure and Applied Algebra, 2014 - Elsevier
In this work we present a full geometric characterization of the 1-dimensional polynomial
and regular images of R n. In addition, given a polynomial image S of R n, we compute the …

On Complements of Convex Polyhedra as Polynomial and Regular Images of ℝn

JF Fernando, C Ueno - International Mathematics Research …, 2014 - ieeexplore.ieee.org
In this work we prove constructively that the complement \mathbbR^n\\mathcalK of a convex
polyhedron \mathcalK⊂\mathbbR^n and the complement \mathbbR^n\Int(\mathcalK) of its …

Multi-objective convex polynomial optimization and semidefinite programming relaxations

JH Lee, N Sisarat, L Jiao - Journal of Global Optimization, 2021 - Springer
This paper aims to find efficient solutions to a multi-objective optimization problem (MP) with
convex polynomial data. To this end, a hybrid method, which allows us to transform problem …

On convex polygons and their complements as images of regular and polynomial maps of R2

C Ueno - Journal of Pure and Applied Algebra, 2012 - Elsevier
In this work, we continue the study of polynomial and regular images of Euclidean spaces
initiated in recent papers by Fernando and Gamboa. We prove that the complement of each …

On the Set of Points at Infinity of a Polynomial Image of

JF Fernando, C Ueno - Discrete & Computational Geometry, 2014 - Springer
In this work we prove that the set of points at infinity S_ ∞:=\; Cl _\mathbb R\mathbb P^ m (S)
∩ H _ ∞ S∞:= Cl RP m (S)∩ H∞ of a semialgebraic set S ⊂\mathbb R^ m S⊂ R m that is …

On regulous and regular images of Euclidean spaces

JF Fernando, G Fichou, R Quarez… - The Quarterly Journal of …, 2018 - academic.oup.com
In this work we compare the semialgebraic subsets that are images of regulous maps with
those that are images of regular maps. Recall that a map f: R n→ R m is regulous if it is a …

[HTML][HTML] On Nash images of Euclidean spaces

JF Fernando - Advances in Mathematics, 2018 - Elsevier
In this work we characterize the subsets of R n that are images of Nash maps f: R m→ R n.
We prove Shiota's conjecture and show that a subset S⊂ R n is the image of a Nash map f …

On the complements of 3-dimensional convex polyhedra as polynomial images of ℝ3

JF Fernando, C Ueno - International Journal of Mathematics, 2014 - World Scientific
Let be a convex polyhedron of dimension n. Denote and let be its closure. We prove that for
n= 3 the semialgebraic sets and are polynomial images of ℝ3. The former techniques cannot …