Isometry groups of pseudoriemannian 2-step nilpotent lie groups

• Autores: Luis Angel Cordero Rego , Phillip E. Parker
• Localización: Houston journal of mathematics, ISSN 0362-1588, Vol. 35, Nº 1, 2009, págs. 49-72
• Idioma: inglés
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• Resumen

  • While still a semidirect product, the isometry group can be strictly larger than the obvious Riemannian analogue I. In fact, there are three relevant groups of isometries, Ispl = I = I, and Ispl < I < I is possible when the center is degenerate. When the center is nondegenerate, Ispl = I.