TY  - JOUR
AU  - Fernando Galván, José Francisco
PY  - 2003
DO  - 10.1007/s00209-003-0519-x
SN  - 0025-5874
UR  - https://hdl.handle.net/20.500.14352/57236
T2  - Mathematische Zeitschrift
AB  - We 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....
LA  - eng
M2  - 725
PB  - Springer
KW  - Positive Semidefinite Germs
KW  - Squares
KW  - Rings
KW  - Sums
TI  - Analytic surface germs with minimal Pythagoras number
TY  - journal article
VL  - 244
ER  -