522 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Instituto Superior TécnicoPT53 papers
- University of LisbonPT24 papers
- Centro de MatemáticaPT10 papers
- Universidade Técnica de LisboaPT9 papers
- University of MinhoPT9 papers
- Iscte – Instituto Universitário de LisboaPT4 papers
- Universidade do PortoPT4 papers
- Universidade Federal do Rio de JaneiroBR3 papers
- University of TurinIT3 papers
- Centre National de la Recherche ScientifiqueFR2 papers
- Heriot-Watt UniversityGB2 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TorinoIT2 papers
8 papers · 1 filter
Holomorphic bundles on the blown-up plane and the bar construction
João Santos
We study the moduli space of rank holomorphic bundles with trivial determinant and second Chern class , over the blowup $\ti…
Continuous families of divisors, paracanonical systems and a new inequality for varieties of maximal Albanese dimension
Margarida Mendes Lopes, Rita Pardini, Gian Pietro Pirola
Given a smooth complex projective variety X, a line bundle L of X an element v of H^1(O_X) and a section s in H^0(L) that deforms to first order in the direction v, we give a suffi…
Optimal escape from circular orbits around black holes
Jose Natario
Using the theory of optimal rocket trajectories in general relativity, recently developed in arXiv:1105.5235, we show that the "obvious" manoeuvre of using a tangential instantaneo…
Gravito-electromagnetic analogies
L. Filipe O. Costa, José Natário
We reexamine and further develop different gravito-electromagnetic (GEM) analogies found in the literature, and clarify the connection between them. Special emphasis is placed in t…
Polygons in Minkowski three space and parabolic Higgs bundles of rank two on CP^1
Indranil Biswas, Carlos Florentino, Leonor Godinho +1
Consider the moduli space of parabolic Higgs bundles (E,Φ) of rank two on CP^1 such that the underlying holomorphic vector bundle for the parabolic vector bundle E is trivial. It i…
The problem of a self-gravitating scalar field with positive cosmological constant
Joao L. Costa, Artur Alho, Jose Natario
We study the Einstein-scalar field system with positive cosmological constant and spherically symmetric characteristic initial data given on a truncated null cone. We prove well-po…
Stationary Black Holes: Uniqueness and Beyond
Piotr T. Chruściel, João Lopes Costa, Markus Heusler
The spectrum of known black-hole solutions to the stationary Einstein equations has been steadily increasing, sometimes in unexpected ways. In particular, it has turned out that no…
Displacing Lagrangian toric fibers by extended probes
Miguel Abreu, Matthew Strom Borman, Dusa McDuff
In this paper we introduce a new way of displacing Lagrangian fibers in toric symplectic manifolds, a generalization of McDuff's original method of probes. Extended probes are form…