We establish necessary and sufficient conditions for a sequence of
d-dimensional vectors of multiple stochastic integrals
Fdk = (F1k, ..., Fdk)\mathbf{F}_{d}^{k} = (F_{1}^{k}, \dots, F_{d}^{k})
,
k ³ 1k\geq 1
, to converge in distribution to a
d-dimensional Gaussian vector
Nd = (N1, ..., Nd)\mathbf{N}_{d} = (N_{1}, \dots, N_{d})
. In particular, we show that if the covariance structure of
Fdk converges to that of
Nd, then componentwise convergence implies joint convergence. These results extend to the multidimensional case the main theorem of [10].
Keywords: Multiple stochastic integrals - Limit theorems - Weak convergence - Brownian motion.
Mathematics Subject Classification (2000): AMS Subject classification: 60F05 - 60H05