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pro vyhledávání: '"Alves, Emília"'
Locally convex (or nondegenerate) curves in the sphere $S^n$ (or the projective space) have been studied for several reasons, including the study of linear ordinary differential equations of order $n+1$. Taking Frenet frames allows us to obtain corre
Externí odkaz:
http://arxiv.org/abs/2205.10928
Autor:
Alves, Emília, Saldanha, Nicolau
In a companion manuscript, we introduce a stratification of intersections of a top dimensional real Bruhat cells with another arbitrary cell. This intersection is naturally identified with a subset of the lower triangular group: these subsets are lab
Externí odkaz:
http://arxiv.org/abs/2109.13888
Autor:
Alves, Emília, Saldanha, Nicolau C.
Real Bruhat cells give an important and well studied stratification of such spaces as $GL_{n+1}$, $Flag_{n+1} = SL_{n+1}/B$, $SO_{n+1}$ and $Spin_{n+1}$. We study the intersections of a top dimensional cell with another cell (for another basis). Such
Externí odkaz:
http://arxiv.org/abs/2012.11651
Autor:
Alves, Emília
In this paper we provide a characterization for a class of convex curves on the 3-sphere. More precisely, using a theorem that decomposes a locally convex curve on the 3-sphere as a pair of curves on the 2-sphere, one of which is locally convex and t
Externí odkaz:
http://arxiv.org/abs/2002.03986
Autor:
Berlanga, Luis A., Matos-Duarte, Michelle, Abdalla, Pedro, Alves, Emília, Mota, Jorge, Bohn, Lucimere
Publikováno v:
In Geriatric Nursing May-June 2023 51:415-421
Autor:
Alves, Emília, Saldanha, Nicolau C.
A curve $\gamma: [0,1] \rightarrow S^n$ of class $C^k$ ($k \geqslant n$) is locally convex if the vectors $\gamma(t), \gamma'(t), \gamma"(t), \cdots, \gamma^{(n)}(t)$ are a positive orthonormal basis to $R^{n+1}$ for all $t \in [0,1]$. Given an integ
Externí odkaz:
http://arxiv.org/abs/1703.02581
Autor:
Alves, Emília
A (positive) locally convex curve in the 2-sphere is a curve with positive geodesic curvature (i.e., which always turns left). In the 3-sphere, it is a curve with positive torsion. In this work we discussed the topology of spaces of such curves with
Externí odkaz:
http://arxiv.org/abs/1608.04635
Autor:
Alves, Emília1,2 (AUTHOR) emilia.alves@ulusofona.pt, Gregório, João1 (AUTHOR) joao.gregorio@ulusofona.pt, Rijo, Patrícia1,3 (AUTHOR) patricia.rijo@ulusofona.pt, Rosado, Catarina1 (AUTHOR) catarina.rosado@ulusofona.pt, Rodrigues, Luís Monteiro1 (AUTHOR) monteiro.rodrigues@ulusofona.pt
Publikováno v:
Life (2075-1729). Jul2022, Vol. 12 Issue 7, p1075-1075. 9p.
Autor:
Ferreira, João1 joaoferreira.13255@gmail.com, Alves, Emília2,3, Abrantes, Catarina4,5, Gabriel, Ronaldo4,6, Silva, Paulo7, Moreira, Helena4,5,6
Publikováno v:
Motricidade. 2024 Supplement, Vol. 20, p33-34. 2p.
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