Pointwise multipliers of Orlicz spaces

Pointwise multipliers of Orlicz spaces
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DOI:
10.1007/s00013-010-0160-y
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发表时间:
2010-07
影响因子:
0.6
通讯作者:
L. Maligranda;E. Nakai
L. Maligranda;E. Nakai
中科院分区:
数学4区
文献类型:
--
作者:
L. Maligranda;E. Nakai

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我们证明了Orlicz空间乘子的结果一般成立。也就是说,在假设生成相应Orlicz空间的三个Young函数Φ1,Φ 2和Φ满足对allu> 0的估计的条件下,我们证明了:如果逐点积xy对所有都属于L Φ(μ),则.在对Young函数或测度μ有一定限制的情况下,这一结果已由Edranda和Edrsson(Indag. 51(1989),323-338)。我们的结果对满足上述估计的任意三个Young函数的集合和任意完备σ-有限测度μ成立。
We show that the result on multipliers of Orlicz spaces holds in general. Namely, under the assumption that three Young functions Φ1, Φ2and Φ, generating corresponding Orlicz spaces, satisfy the estimatefor allu> 0, we prove that if the pointwise productxybelongs toLΦ(μ) for all, then. The result with some restrictions either on Young functions or on the measureμwas proved by Maligranda and Persson (Indag. Math.51(1989), 323–338). Our result holds for any collection of three Young functions satisfying the above estimate and for an arbitrary complete σ-finite measureμ.