Listar por autor "Turiel-Sandín, Francisco Javier"
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Groups as automorphisms of dessins d’enfants
Cañas Muñoz, Alejandro; Hidalgo, Rubén A.; Turiel-Sandín, Francisco Javier
; Viruel-Arbaizar, Antonio Ángel (Springer, 2022-08-01)
It is known that every finite group can be represented as the full group of automorphisms of a suitable compact dessin d’enfant. In this paper, we give a constructive and easy proof that the same holds for any countable ... -
Smooth actions of connected compact Lie groups with a free point are determined by two vector fields
Turiel-Sandín, Francisco Javier; Viruel-Arbaizar, Antonio Ángel (Elsevier, 2024-04-10)
Consider a smooth action of a compact connected Lie group G on a connected manifold M. Assume the existence of a point of M whose isotropy group has a single element (a free point). Then we prove that there exist two ... -
Sobre la dimensión minimal de las orbitas de una acción de Rn
Considérese una acción diferenciable de Rn sobre una variedad conexa M, no necesariamente compacta, de dimensión m y rango k. Supóngase que M no es un cilindro. Entonces existe una órbita de la acción de dimensión < ...