In this paper we prove that if chi(E) (xi - eta) -the indicator function of a measurable set E subset of R-d is a bi-linear multiplier symbol for exponents p, q, r satisfying the H " older's condition 1/p + 1/q = 1/r and exactly one of p, q, or r' = r/r-1 is less than 2, then E is equivalent to an open subset of R-d.
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页码:3055 / 3061
页数:7
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Blasco O., 2005, INT J MATH MATH SCI, V2005, P545, DOI DOI 10.1155/IJMMS.2005.545