Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Margarida P. Mello"'
Autor:
Margarida P. Mello, Sandra A. Santos
Publikováno v:
Zetetiké, Vol 10, Iss 1-2 (2009)
Usando como mote o vazamento de petróleo de um navio em uma região costeira, elabora-se um projeto de Cálculo de várias variáveis que explora, principalmente, o tópico “curvas de nível”. Após modelar e estudar um dado problema, pede-se ta
Externí odkaz:
https://doaj.org/article/ed426ea50d084c8193b65f781e4bbaea
Autor:
Robert M. Gower, Margarida P. Mello
We investigate the computation of Hessian matrices via Automatic Differentiation, using a graph model and an algebraic model. The graph model reveals the inherent symmetries involved in calculating the Hessian. The algebraic model, based on Griewank
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d0911bf4e3ef5affe8d1e67c695687c
Autor:
Maria Alice Bertolim, Margarida P. Mello, Ketty A. de Rezende, Dahisy V. S. Lima, Mariana R. da Silveira
Publikováno v:
European Journal of Mathematics. 3:387-428
We study algorithms that give rise to a global Smale’s Cancellation Theorem for dimensions $$n\geqslant 6$$ . The Spectral Sequence Sweeping Algorithm (SSSA) and the Row Cancellation Algorithm (RCA) for a filtered Morse chain complex on a manifold
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c55cc520c4c6939e0096433a5fa29f6
https://doi.org/10.1007/s40879-017-0144-6
https://doi.org/10.1007/s40879-017-0144-6
Autor:
Maria Alice Bertolim, M. R. Da Silveira, Dahisy V. S. Lima, Margarida P. Mello, K. A. de Rezende
Publikováno v:
Ergodic Theory and Dynamical Systems. 36:1795-1838
In this article, Conley’s connection matrix theory and a spectral sequence analysis of a filtered Morse chain complex $(C,{\rm\Delta})$ are used to study global continuation results for flows on surfaces. The briefly described unfoldings of Lyapuno
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c90536b499ef3c1a08e51f1fdf91d08f
https://doi.org/10.1017/etds.2014.142
https://doi.org/10.1017/etds.2014.142
Publikováno v:
The Mathematical Gazette. 94:51-61
Do the following objects shown on the cover belong together?We will argue that they do bear a certain kinship, sharing the common gene of cylindrical intersection. In fact, we hope this essay will awaken in the reader the ability to discern several o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4279bf3f9454daf298069563223ce40
https://doi.org/10.1017/s0025557200007142
https://doi.org/10.1017/s0025557200007142
Publikováno v:
Journal of Global Optimization. 40:505-527
Reformulations of a generalization of a second-order cone complementarity problem (GSOCCP) as optimization problems are introduced, which preserve differentiability. Equivalence results are proved in the sense that the global minimizers of the reform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff9bea2aa39b2ba77db740423f2e201b
https://doi.org/10.1007/s10898-006-9109-x
https://doi.org/10.1007/s10898-006-9109-x
Publikováno v:
International Journal for Computational Methods in Engineering Science and Mechanics. 6:85-94
In this work we show that the mixed nonlinear complementarity problem may be formulated as an equivalent nonlinear bound-constrained optimization problem that preserves the smoothness of the original data. One may thus take advantage of existing code
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eddf569b61da2055e881cd21994a5d78
https://doi.org/10.1080/15502280590891564
https://doi.org/10.1080/15502280590891564
Publikováno v:
Qualitative Theory of Dynamical Systems. 6:59-86
In this article we will show that, in general, for each integral point (γ0,...,γ n ) in the Morse polytope,P κ (h o , ...,h n ), one can associate an abstract Lyapunov graphL(h o , ...,h n ,κ) withntd-labelling and realize a corresponding flow on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da2ab8ea16351539689077ffdc0aa017
https://doi.org/10.1007/bf02972668
https://doi.org/10.1007/bf02972668
Publikováno v:
Transactions of the American Mathematical Society. 357:4091-4129
In this article the main theorem establishes the necessity and sufficiency of the Poincare-Hopf inequalities in order for the Morse inequalities to hold. The convex hull of the collection of all Betti number vectors which satisfy the Morse inequaliti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b74f74245cd30a7d6b154f332072c5a
https://doi.org/10.1090/s0002-9947-04-03641-4
https://doi.org/10.1090/s0002-9947-04-03641-4
Publikováno v:
Qualitative Theory of Dynamical Systems. 4:181-203
In this survey we present the interplay between topological dynamical systems theory with network flow theory in order to obtain a continuation result for abstract Lyapunov graphsL(h 0, …, hn, k) in dimensionn with cycle numberk. We also show that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f666a7cdaed24330d1149d41ea4121cd
https://doi.org/10.1007/bf02970858
https://doi.org/10.1007/bf02970858