Fourier integral operators with fold singularities.

Fourier integral operators with fold singularities.
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具有折叠奇点的傅立叶积分算子。

DOI:
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发表时间:
1994
期刊:
影响因子:
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通讯作者:
A. Seeger
A. Seeger
中科院分区:
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文献类型:
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作者:
A. Greenleaf;A. Seeger

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是局部双同态。具体地,dx = dY-=d。然后,如果β α- μ,则β ε 1(β,β,β ′)将β α,β β,β ′映射到L> tloc(X)。这是由H rmander在[7]中证明的微积分的一个结果。通过将3F与分数次积分算子组合,很容易看出,如果β ∈ αμd/2 + d/q,则β G/*(jr,r,<jf ')将La,comp映射到I ∈ Ioc,2 ^ < 7 <0。更一般地,如果dx,dy和dnL具有最大秩2dx,则相同的映射性质适用于类中的傅立叶积分算子。
are locally diffeomorphisms. In particular dx = dY-=d. Then &εΙ(Χ,Υ,<€') maps ^a.compOO into L> tloc(X) if β ^ a — μ. This was shown by H rmander s a consequence of the calculus in [7]. By composing 3F with a fractional integral operator it is easy to see that ^G/*(jr,r,<jf') maps La,comp into I£Ioc, 2 ^ < 7 < o o , if β £ αμd/2 + d/q. More general if dx ^ dy and dnL has maximal rank 2dx then the same mapping properties hold for Fourier integral operators in the class ̂ 6/ + ~(T, 7,«")·