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Tag: rank-gaps
Ebenfelt's SOS conjecture for ranks of prolonged sums of squares
At least 4 years old
SOS Conjecture. If
A
(
z
,
z
ˉ
)
∥
z
∥
2
∈
S
O
S
n
A(z,\bar{z})\|z\|^2\in {\rm{SOS}}_n
A
(
z
,
z
ˉ
)
∥
z
∥
2
∈
SOS
n
, then either