Displaying similar documents to “Endpoint boundedness for multilinear integral operators of some sublinear operators on Herz and Herz type Hardy spaces.”

Variable Lebesgue norm estimates for BMO functions

Mitsuo Izuki, Yoshihiro Sawano (2012)

Czechoslovak Mathematical Journal

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In this paper, we are going to characterize the space BMO ( n ) through variable Lebesgue spaces and Morrey spaces. There have been many attempts to characterize the space BMO ( n ) by using various function spaces. For example, Ho obtained a characterization of BMO ( n ) with respect to rearrangement invariant spaces. However, variable Lebesgue spaces and Morrey spaces do not appear in the characterization. One of the reasons is that these spaces are not rearrangement invariant. We also obtain an analogue...

Estimates for the commutator of bilinear Fourier multiplier

Guoen Hu, Wentan Yi (2013)

Czechoslovak Mathematical Journal

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Let b 1 , b 2 BMO ( n ) and T σ be a bilinear Fourier multiplier operator with associated multiplier σ satisfying the Sobolev regularity that sup κ σ κ W s 1 , s 2 ( 2 n ) < for some s 1 , s 2 ( n / 2 , n ] . In this paper, the behavior on L p 1 ( n ) × L p 2 ( n ) ( p 1 , p 2 ( 1 , ) ) , on H 1 ( n ) × L p 2 ( n ) ( p 2 [ 2 , ) ) , and on H 1 ( n ) × H 1 ( n ) , is considered for the commutator T σ , b defined by T σ , b ( f 1 , f 2 ) ( x ) = b 1 ( x ) T σ ( f 1 , f 2 ) ( x ) - T σ ( b 1 f 1 , f 2 ) ( x ) + b 2 ( x ) T σ ( f 1 , f 2 ) ( x ) - T σ ( f 1 , b 2 f 2 ) ( x ) . By kernel estimates of the bilinear Fourier multiplier operators and employing some techniques in the theory of bilinear singular integral operators, it is proved that these mapping properties are very similar to those...