Fernando Galván, José Francisco2023-06-202023-06-2020030025-587410.1007/s00209-003-0519-xhttps://hdl.handle.net/20.500.14352/57236Erratum: Analytic surface germs with minimal Pythagoras number.Mathematische Zeitschrift. 250(2005)no. 4, 967-969We determine all complete intersection surface germs whose Pythagoras number is 2, and find that they are all embedded in R-3 and have the property that every positive semidefinite analytic function germ is a sum of squares of analytic function germs. In addition, we discuss completely these properties for mixed surface germs in R-3. Finally, we find in higher embedding dimension three different families with these same properties.engjournal articlehttp://www.springerlink.com/content/krjuhbn3kjn9thnl/fulltext.pdfhttp://www.springerlink.com/restricted access511512.7Positive Semidefinite GermsSquaresRingsSumsTeoría de númerosGeometria algebraica1205 Teoría de Números1201.01 Geometría Algebraica