33 full articles in journals, one book chapter, and one preface, listed in reverse chronological order. Source: Lattes CV, updated 06/30/2026.
2026
A Chain Complex for Computing Intersection Homology of GS Manifolds with n-sheet Cone Singularities
Lima, D. V. S.; Tenório, D.; Grulha, N. G.
Bulletin of the Brazilian Mathematical Society, v. 57, p. 1–35
2025
Equivariant characteristic classes of singular hypersurfaces
Grulha, N. G.; Monteiro, A.; Morgado, M. F. Z.
International Journal of Mathematics, v. 36, p. 2450078
2024
From Milnor number to the Euler obstruction of a map on isolated determinantal singularities
de Omena, R.; Grulha, N. G.; Pereira, M.
Manuscripta Mathematica, v. 174, p. 973–989
2024
A perspective of Cidinha's research works
Birbrair, L.; Grulha, N. G.; Pereira, M. S.
São Paulo Journal of Mathematical Sciences, v. 18, p. 1143–1153
2023
The effect of singularization on the Euler characteristic
Grulha Jr., N. G.; Lima, D. V. S.; Rezende, K. A.; Zigar, M. A. J.
Matemática Contemporânea, v. 53, p. 254–277
2023
Índice de Conley para fluxos Gutierrez–Sotomayor
Grulha, N.; Lima, D.; Tenório, D.
Revista Matemática Universitária, v. 2, p. 114–130
2023
Generalization of Kennedy's integral formula using Milnor defect
Barbosa, G. F.; Grulha Jr, N. G.; Pereira, M. S.; Seade, J.
São Paulo Journal of Mathematical Sciences
2023
Conley index theory for Gutierrez–Sotomayor flows on singular 3-manifolds
de Rezende, K. A.; Grulha Jr., N. G.; Lima, D. V. de S.; Zigart, M. A. J.
Topological Methods in Nonlinear Analysis, v. 62, p. 1–60
2022
Gutierrez–Sotomayor flows on singular surfaces
Rezende, K. A.; Grulha Jr., N. G.; Lima, D. V. S.; Zigar, M. A. J.
Topological Methods in Nonlinear Analysis, v. 60, p. 221–265
2022
The geometrical information encoded by the Euler obstruction of a map
Grulha Jr., N. G.; Ruiz, C. M.; Santana, H. M. C.
International Journal of Mathematics, p. 2250029
2022
Local Euler obstruction, old and new, III
Brasselet, J.-P.; Grulha Jr., N. G.; Nguyên, T. T. B.
Journal of Singularities, v. 25, p. 90–122
2021
Results on Milnor Fibrations for Mixed Polynomials with Non-isolated Singularities
Grulha, N. G.; Martins, R. S.
Bulletin Brazilian Mathematical Society, v. 52, p. 327–351
2021
Classe Equivariante de Chern-Schwartz-MacPherson
Monteiro, A.; Grulha Jr., N. G.
Cadernos do IME – Série Matemática, p. 144–157
2020
Real and complex integral closure, Lipschitz equisingularity and applications on square matrices
Silva, T. F.; Grulha Jr., N. G.; Pereira, M. S.
Journal of Singularities, v. 22, p. 215–226
2019
The local Euler obstruction and topology of the stabilization of associated determinantal varieties
Grulha Jr., N. G.; Gaffney, T.; Ruas, M. A. S.
Mathematische Zeitschrift, v. 291, p. 905–930
2019
Global Euler obstruction, global Brasselet numbers and critical points
Dutertre, N.; Grulha, N. G.
Proceedings of the Royal Society of Edinburgh Section A – Mathematics, v. 150, p. 2503–2534
2018
The Bi-Lipschitz Equisingularity of Essentially Isolated Determinantal Singularities
Pereira, M. S.; Silva, T. F.; Grulha Jr., N. G.
Bulletin of the Brazilian Mathematical Society, v. 49, p. 637–645
2017
Minimal Whitney stratification and Euler obstruction of discriminants
Barbosa, G. F.; Grulha, N. G.; Saia, M. J.
Geometriae Dedicata, v. 186, p. 173–180
2015
Toric surfaces, vanishing Euler characteristic and Euler obstruction of a function
Dalbelo, T. M.; Grulha Jr., N. G.; Pereira, M. S.
Annales de la Faculté des Sciences de Toulouse, v. 25, p. 1–20
2015
The Euler obstruction and torus action
Dalbelo, T. M.; Grulha, N. G.
Geometriae Dedicata, v. 175, p. 373–383
2014
Lê–Greuel type formula for the Euler obstruction and applications
Dutertre, N.; Grulha Jr., N. G.
Advances in Mathematics, v. 251, p. 127–146
Advances in Mathematics
2014
On the topology of real analytic maps
Cisneros-Molina, J. L.; Grulha Jr., N. G.; Seade, J.
International Journal of Mathematics, v. 25
2014
Some notes on the Euler obstruction of a function
Dutertre, N.; Grulha Jr., N. G.
Journal of Singularities, v. 10, p. 82–91
2013
The Multiplicity Polar Theorem, Collections of 1-forms and Chern Numbers
Gaffney, T.; Grulha Jr., N. G.
Journal of Singularities, v. 7, p. 36–39
2012
Polar multiplicities and Euler obstruction for ruled surfaces
Grulha Jr., N. G.; Hernandes, M. E.; Martins, R.
Boletim da Sociedade Brasileira de Matemática, v. 43, p. 443–451
2012
The Euler Obstruction and Bruce–Roberts' Milnor Number
Grulha, N. G.
Quarterly Journal of Mathematics, v. 63, p. 257–258
2011
Stability of the Euler obstruction of a function
Grulha Jr., N. G.
Boletín de la Sociedad Matemática Mexicana, v. 17, p. 95–103
2010
Lyapunov stability of closed sets in impulsive semidynamical systems
Bonotto, E. M.; Grulha Jr., N. G.
Electronic Journal of Differential Equations, v. 2010, p. 1–18
2010
The Euler obstruction and the Chern obstruction
Brasselet, J.-P.; Grulha, N. G.; Ruas, M. A. S.
Bulletin of the London Mathematical Society, v. 42, p. 1035–1043
Bull. LMS
2009
The Euler Obstruction and Bruce–Roberts' Milnor Number
Grulha Jr., N. G.
Quarterly Journal of Mathematics, v. 60, p. 291–302
2008
L'obstruction d'Euler locale d'une application
Grulha, N. G.
Annales de la Faculté des Sciences de Toulouse, v. 17, p. 53–71
2007
O Teorema de Baire e o conjunto de Cantor
Grulha Jr., N. G.
Boletim de Iniciação Científica em Matemática, v. 4, p. 55–63
2006
Sobre variedades polares de superfícies
Grulha Jr., N. G.; Melo, T.
Matemática Universitária, v. 41, p. 13–26
Book chapter & preface
2010
Local Euler obstruction, old and new, II
Brasselet, J.-P.; Grulha Jr., N. G.
In: Manoel, M.; Romero Fuster, M. C.; Wall, C. T. C. (eds). Real and Complex Singularities, LMS Lecture Notes Series 380. Cambridge University Press, p. 23–45
2023
Preface
Correa Jr., M.; Dalbelo, T. M.; Grulha Jr., N. G.; Ruiz, C. M.