Oscillation and variation for semigroups associated with Bessel operators

Oscillation and variation for semigroups associated with Bessel operators
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与贝塞尔算子相关的半群的振荡和变分

DOI:
10.1016/j.jmaa.2016.05.044
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发表时间:
2016-05
影响因子:
1.3
通讯作者:
Zhang Jing
Zhang Jing
中科院分区:
数学3区
文献类型:
--
作者:
Wu Huoxiong;Yang Dongyong;Zhang Jing

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设λ>0和λ:=−d 2d x 2−2λx d d x是R+:=(0,∞)上的Bessel算子.证明了Poisson半群{Pt[⁎[λ]}t&GT的振荡算子O(Pρ])和变分算子V⁎[λ(Pλ]);与Δλ相关的0都在L p(R+,d mλ)上有界,其中p∈(1,∞),BMO(R+,d mλ),从L 1(R+,d mλ)到L 1,∞(R+,d mλ),以及从H1(R+,d mλ)到L 1(R+,d mλ),其中ρ∈(2,∞)和d mλ(X):=x2λdx.作为应用,得到了H1(R+,d mλ)的一个等价刻划D mλ)表示为Vρ(P⁎[λ])。如果用热半群{Wt[λ]}t>0代替{Pt[λ]}t>0,则所有这些结果都成立。
Let λ> 0 and△ λ:=− d 2 d x 2− 2 λ x d d x be the Bessel operator on R+:=(0,∞). The authors show that the oscillation operator O (P⁎[λ]) and variation operator V ρ (P⁎[λ]) of the Poisson semigroup {P t [λ]} t> 0 associated with Δ λ are both bounded on L p (R+, d m λ) for p∈(1,∞), BMO (R+, d m λ), from L 1 (R+, d m λ) to L 1,∞(R+, d m λ), and from H 1 (R+, d m λ) to L 1 (R+, d m λ), where ρ∈(2,∞) and d m λ (x):= x 2 λ d x. As an application, an equivalent characterization of H 1 (R+, d m λ) in terms of V ρ (P⁎[λ]) is also established. All these results hold if {P t [λ]} t> 0 is replaced by the heat semigroup {W t [λ]} t> 0.
DOI: 10.1007/bf02698838
发表时间: 1989-12
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