Geodesic
Some Remarks on Transformations in Metric Spaces
Canadian mathematical bulletin, Tome 8 (1965) no. 5, pp. 659-666

Voir la notice de l'article provenant de la source Cambridge University Press

Recently A. Haimovici [1] has proved a general fixed point theorem of transformations in metric spaces from which he obtained existence theorems for certain types of ordinary and partial differential equations. However, both the result and the proof are given for a rather special case. One of the purposes of this present note is to put his result on a more concrete basis and give a stronger characterization of the kind of transformations used in [l]. (Theorem 3). 
Wong, James S. W. Some Remarks on Transformations in Metric Spaces. Canadian mathematical bulletin, Tome 8 (1965) no. 5, pp. 659-666. doi: 10.4153/CMB-1965-049-5
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