TY  - JOUR
AU  - Ruiz Sancho, Jesús María
PY  - 1999
DO  - 10.1007/PL00004692
SN  - 0025-5874
UR  - https://hdl.handle.net/20.500.14352/57922
T2  - Mathematische Zeitschrift
AB  - We study analytic singularities for which every positive semidefinite analytic function is a sum of two squares of analytic functions. This is a basic useful property of the plane, but difficult to check in other cases; in particular, what about...
LA  - eng
M2  - 317
PB  - Springer
KW  - Sums of two squares
KW  - analytic rings
KW  - Brieskorn singularity
KW  - complete intersecton
TI  - Sums of two squares in analytic rings
TY  - journal article
VL  - 230
ER  -