RT Journal Article
T1 Sums of squares in real analytic rings.
A1 Fernando Galván, José Francisco
AB Let A be an analytic ring. We show:(1) A has finite Pythagoras number if and only if its real dimension is  2, and (2) if every positive semidefinite element of A is a sum of squares, then A is real and has real dimension 2.
PB American Mathematical Society
SN 0002-9947
YR 2002
FD 2002
LK https://hdl.handle.net/20.500.14352/57241
UL https://hdl.handle.net/20.500.14352/57241
LA eng
NO DGICYT
DS Docta Complutense
RD 22 abr 2025