Título inglés |
Sharp edge-homotopy on spatial graphs. |
Título español |
Homotopía de borde agudo en grafos espaciales. |
Autor/es |
Nikkuni, Ryo |
Organización |
Dep. Math. Sch. Educ. Waseda Univ., Tokio, Japón |
Revista |
1139-1138 |
Publicación |
2005, 18 (1): 181-207, 29 Ref. |
Tipo de documento |
articulo |
Idioma |
Inglés |
Resumen inglés |
A sharp-move is known as an unknotting operation for knots. A self sharp-move is a sharp-move on a spatial graph where all strings in the move belong to the same spatial edge. We say that two spatial embeddings of a graph are sharp edge-homotopic if they are transformed into each other by self sharp-moves and ambient isotopies. We investigate how is the sharp edge-homotopy strong and classify all spatial theta curves completely up to sharp edge-homotopy. Moreover we mention a relationship between sharp edge-homotopy and delta edge (resp. vertex)-homotopy on spatial graphs. |
Clasificación UNESCO |
121015 |
Palabras clave español |
Nudos topológicos ; Homotopía ; Grafo espacial |
Código MathReviews |
MR2135538 |
Código Z-Math |
Zbl 1080.57003 |
Acceso al artículo completo |