Appendix 1

Proposition 9.1.1 Let be a symmetric k-linear form on and A[x, y] be a positive-semidefinite quadratic form on . If ∀x∈Rn:|H[x,…,x]|≤{A[x,x]}k/2,9.1.1 then ∀(x1,…,xk∈Rn):|H[x1,…,xk]|≤Πi=1k{A[xi,xi]}1/2.9.1.2 Proof. Of course, it suffices to prove the proposition in the case of positive-definite A (i... View More