Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Proceedings of the J...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
Proceedings of the Japan Academy. Series A
Article . 1996 . Peer-reviewed
Data sources: Crossref
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
Proceedings of the Japan Academy. Series A
Article
License: implied-oa
Data sources: UnpayWall
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
Project Euclid
Other literature type . 1996
Data sources: Project Euclid
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 1996
Data sources: zbMATH Open
versions View all 3 versions
addClaim

This Research product is the result of merged Research products in OpenAIRE.

You have already added 0 works in your ORCID record related to the merged Research product.

On the non-analytic examples of Christ and Geller

Authors: Kamimoto, Joe;

On the non-analytic examples of Christ and Geller

Abstract

A counterexample to analytic hypoellipticity of \(\overline\partial_b\) for a real analytic \(CR\) manifold of finite type given by Christ and Geller is as follows: The Szégö kernel of \(M_m(m=2,3, \dots)\) fails to be real analytic off of the diagonal. As a corollary a three dimensional \(CR\) manifold, \(M_m=\{I_mz_2 =[R_ez_1]^{2m}\}\) \((m=2,3, \dots)\), \(\overline \partial_b\) fails to be relatively analytic hypoelliptic. The present paper considers the hypersurface \(M_m= \{I_mz_2=P(z_1) \subset\mathbb{C}^2\), where \(P:\mathbb{C} \mapsto\mathbb{R}\) is a subharmonic, nonharmonic polynomial\}. Such a surface is pseudoconvex and of finite type. A nonvanishing, antiholomorphic tangent vector field is \({\partial\over\partial \overline z_1}-2i ({\partial P\over\partial \overline z_1}) {\partial\over\partial \overline z_1}\). The coordinates for the surface are \(C\times\mathbb{R}\ni (z=x+iy,t) \mapsto (z,t+iP(z))\). The vector field pulls back to \(\overline\partial_b= {\partial\over\partial \overline z} -i({\partial P\over\partial \overline z_1}) {\partial\over\partial t}\). The formal adjoint is denoted \(\overline\partial^*_b\). When \(M=M_m\), Christ constructed singular solutions for \(\overline\partial_bu=0\) \((u=\overline\partial^*_b v,\;v\in L^2)\) by Fourier transforms. Letting \(s(z,t)\) be the Szégö kernel of \(M\) and if \(M=M_m\) \((m=2,3, \dots)\) the author gives a representation for the counterexample to be \(K(z,t)= S((x,t);\;(0,0))\) as \(K(z,t)= c\int^\infty_0e^{-p} H(z,t;p)dp\) whenever \(|\arg z\pm {\pi\over 2} |< {1 \over 2m-1} \cdot {\pi\over 2}\) and \(H(z,t;p)= \sum^\infty_{j=1} c_jS_j^{1\over m} (z,t)p^{f(j)}\) for some \(f(j)=j+j_0+ O({1\over j})\) as \(j\to\infty\). Further refined results are also established.

Related Organizations
Keywords

Harmonic, subharmonic, superharmonic functions on other spaces, Szegö kernel, 32F20, Pseudoconvex domains, hypoellipticity counterexamples, 32H10, \(\overline\partial\) and \(\overline\partial\)-Neumann operators, hypersurface, subharmonic, nonharmonic

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green
gold