BELLMAN FUNCTIONS AND ESTIMATES FOR PARAPRODUCTS
Vjekoslav Kovač
Kristina Ana Škreb
Abstract: We give an explicit formula for one possible Bellman function associated with the
boundedness of dyadic paraproducts regarded as bilinear operators or trilinear forms. Then
we apply the same Bellman function in various other settings, to give self-contained
alternative proofs of the estimates for several classical operators. These include the
martingale paraproducts of Bańuelos and Bennett and the paraproducts with respect to the
heat flows.
2010 AMS Mathematics Subject Classification: Primary: 60G46; Secondary:
42B15.
Keywords and phrases: Bellman function, martingale, paraproduct.