ALMOST ORTHOGONALITY AND A CLASS OF BOUNDED BILINEAR PSEUDODIFFERENTIAL OPERATORS

@inproceedings{Bnyi2004ALMOSTOA,
  title={ALMOST ORTHOGONALITY AND A CLASS OF BOUNDED BILINEAR PSEUDODIFFERENTIAL OPERATORS},
  author={{\'A}rp{\'a}d B{\'e}nyi and Rodolfo H. Torres},
  year={2004}
}
Several results and techniques that generate bilinear alternatives of a celebrated theorem of Calderón and Vaillancourt about the L2 continuity of linear pseudodifferential operators with symbols with bounded derivatives are presented. The classes of bilinear pseudodifferential symbols considered are shown to produce continuous operators from L2 × L2 into L1. 

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