Fernando Galván, José Francisco2023-06-202023-06-2020010021-869310.1006/jabr.2001.8869https://hdl.handle.net/20.500.14352/57242We show that the Pythagoras number of a real analytic ring of dimension 2 is finite, bounded by a function of the multiplicity and the codimension.engjournal articlehttp://www.sciencedirect.com/science/article/pii/S0021869301988696http://www.sciencedirect.com/restricted access512.7Geometria algebraica1201.01 Geometría Algebraica