Nonconvolution transforms with oscillating kernels that map $Ḃ_{1}^{0,1}$ into itself
Studia Mathematica, Tome 106 (1993) no. 1, pp. 1-44
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We consider operators of the form $(Ωf)(y) = ʃ_{-∞}^∞ Ω(y,u)f(u)du$ with Ω(y,u) = K(y,u)h(y-u), where K is a Calderón-Zygmund kernel and $h ∈ L^∞$ (see (0.1) and (0.2)). We give necessary and sufficient conditions for such operators to map the Besov space $Ḃ^{0,1}_1$ (= B) into itself. In particular, all operators with $h(y) = e^{i|y|^a}$, a > 0, a ≠ 1, map B into itself.
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title = {Nonconvolution transforms with oscillating kernels that map $Ḃ_{1}^{0,1}$ into itself},
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G. Sampson. Nonconvolution transforms with oscillating kernels that map $Ḃ_{1}^{0,1}$ into itself. Studia Mathematica, Tome 106 (1993) no. 1, pp. 1-44. doi: 10.4064/sm-106-1-1-44
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