Extens\~oes de isometrias da esfera de dimens\~ao n
  This article was withdrawn by the author to be incorporated into the paper "Extens\~ao de aplica\c{c}\~oes na esfera de um espa\c{c}o vetorial com produto interno" (arXiv:1109.2866). 
J. Edson Sampaio
math.DG math.FA