TY  - JOUR
AU  - Hrubeš, Pavel
AU  - Wigderson, Avi
AU  - Yehudayoff, Amir
TI  - Non-commutative circuits and the sum-of-squares problem
JO  - Journal of the American Mathematical Society
PY  - 2011
SP  - 871
EP  - 898
VL  - 24
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-2011-00694-2/
DO  - 10.1090/S0894-0347-2011-00694-2
ID  - 10_1090_S0894_0347_2011_00694_2
ER  -