TY  - JOUR
AU  - Fernando Galván, José Francisco
PY  - 2002
DO  - 10.1007/s002080100264
SN  - 0025-5831
UR  - https://hdl.handle.net/20.500.14352/57240
T2  - Mathematische Annalen
AB  - We find all real analytic surface germs in R3 on which every positive semidefinite function germ is a sum of squares (in fact, of two squares) of analytic function germs.
LA  - eng
M2  - 49
PB  - Springer
KW  - Sums of squares
KW  - Analytic rings
KW  - Analytic function germs
KW  - Positive semidefinite functions
KW  - Brieskorn singularity
TI  - Positive semidefinite germs in real analytic surfaces.
TY  - journal article
VL  - 322
ER  -