TY  - JOUR
AU  - Acquistapace, Francesca
AU  - Broglia, Fabrizio
AU  - Fernando Galván, José Francisco
AU  - Ruiz Sancho, Jesús María
PY  - 2005
DO  - 10.1016/j.ansens.2005.04.001
SN  - 0012-9593
UR  - https://hdl.handle.net/20.500.14352/49905
T2  - Annales Scientifiques de l'École Normale Supérieure. Quatrième Série
AB  - We show that (i) every positive semidefinite meromorphic function germ on a surface is a sum of 4 squares of meromorphic function germs, and that (ii) every positive semidefinite global meromorphic function on a normal surface is a sum of 5 squares of...
LA  - eng
M2  - 751
PB  - Société Mathématique de France
KW  - Pythagoras number
KW  - Analytic function
KW  - Analytic function germ
KW  - Meromorphic function
KW  - Meromorphic function germ
TI  - On the pythagoras numbers of real analytic surfaces
TY  - journal article
VL  - 38
ER  -