Using a classical Cauchy integral argument, we obtain sharp-weighted inequality for mth order commutator of a square function with b ∈ BMO. Also, the A p − A ∞ estimate for commutators of square functions is proved.
Using a classical Cauchy integral argument, we obtain sharp-weighted inequality for mth order commutator of a square function with b ∈ BMO. Also, the A p − A ∞ estimate for commutators of square functions is proved.
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