講演者

Juan J. Nuño Ballesteros (Universitat de València)

会場

数学研究室1（埼玉大学理工学研究科棟5階）

アブストラクト

A multiple point of a mapping f:X->Y is a k-tuple of points in X which share the same image in Y. This is well understood when the k points in the source are distinct. The main problem is how to add the diagonal points in order to give a reasonable analytic structure to the multiple point space. We will present several definitions due to Mond, Gaffney or Kleiman, among others, and will discuss the relationship between them.