Abstract
In this partly expository paper, we deal with sharp jet determination results following from a generalization of the Chern—Moser theory to Levi degenerate hypersurfaces with polynomial models, as obtained in [30]. We formulate the jet determination results for finitely smooth hypersurfaces of finite type. Another goal of the paper is to gain more understanding of the symmetries for such hypersurfaces, which violate 2-jet determination. Finally, we collect and state some open problems regarding the existence of graded components of strictly positive weight of the Lie Algebra of symmetries for the model hypersurface
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M. S. Baouendi, P. Ebenfelt and L. P. Rothschild, Local geometric properties of real submanifolds in complex space, Bull. Amer. Math. Soc. (N.S.), 37 (2000), 309–336.
M. S. Baouendi, N. Mir and L. P. Rothschild, Reflection ideals and mappings between generic submanifolds in complex space, J. Geom. Anal., 12 (2002), 543–580.
E. Bedford and S. I. Pinchuk, Convex domains with noncompact groups of automorphisms, Mat. Sb., 185 (1994), 3–26.
T. Bloom and I. Graham, On “type” conditions for generic real submanifolds of Cn, Invent. Math., 40 (1977), 217–243.
M. Beals, C. Fefferman and R. Graham, Strictly pseudoconvex domains in ℂn, Bull. Amer. Math. Soc. (N.S.), 8 (1983), 125–322.
V. Beloshapka, Moduli space of model real submanifolds. Russ. J. Math. Phys., 13 (2006), 245–252.
V. Beloshapka, Real submanifolds of a complex space: their polynomial models, automorphisms, and classification problems, Uspekhi Mat. Nauk, 57 (2002), 3–44 (in Russian); translation in Russian Math. Surveys, 57 (2002), 1–41.
F. Bertrand and L. Blanc-Centi, Stationary holomorphic discs and finite jet determination problems, Math. Ann., 358 (2014), 477–509.
F. Bertrand and G. Della Sala, Stationary discs for smooth hypersurfaces of finite type and finite jet determination, J. Geom. Anal., 25 (2015), 2516–2545.
F. Bertrand, G. Della Sala and B. Lamel, Jet determination of smooth CR automorphisms and generalized stationary discs, Math. Z., 294 (2020), 1611–1634.
F. Bertrand and F. Meylan, The 1-jet determination of stationary discs attached to generic CR submanifolds, arXiv:2112.12176 (2021).
D. Catlin, Boundary invariants of pseudoconvex domains, Ann. Math., 120 (1984), 529–586.
S. S. Chern and J. Moser, Real hypersurfaces in complex manifolds, Acta Math., 133 (1974), 219–271.
P. Ebenfelt, B. Lamel and D. Zaitsev, Finite jet determination of local analytic CR automorphisms and their parametrization by 2-jets in the finite type case, Geom. Funct. Anal., 13 (2003) 546–573.
P. Ebenfelt, B. Lamel and D. Zaitsev, Degenerate real hypersurfaces in ℂ2 with few automorphisms, Trans. Amer. Math. Soc., 361 (2009), 3241–3267.
C. Fefferman, Parabolic invariant theory in complex analysis, Adv. in Math., 31 (1979), 131–262.
A. V. Isaev and B. Kruglikov, On the symmetry algebras of 5-dimensional CR-manifolds, Adv. in Math., 322 (2017), 530–564.
H. Jacobowitz, An Introduction to CR Structures, Mathematical Surveys and Monographs, vol. 32, Amer. Math. Soc. (Providence, RI, 1990).
R. Juhlin, Determination of formal CR mappings by a finite jet, Adv. in Math., 222 (2009), 1611–1648.
R. Juhlin and B. Lamel, Automorphism groups of minimal real-analytic CR manifolds, J. Eur. Math. Soc. (JEMS), 15 (2013), 509–537.
S. Y. Kim and M. Kolář, Infinitesimal symmetries of weakly pseudoconvex manifolds, Math. Z., 300 (2022), 2451–2466.
J. J. Kohn, Boundary behaviour of \(\bar \partial \) on weakly pseudoconvex manifolds of dimension two, J. Differential Geom., 6 (1972), 523–542.
M. Kolář, The Catlin multitype and biholomorphic equivalence of models, Int. Math. Res. Not. IMRN, 18 (2010), 3530–3548.
M. Kolář, Normal forms for hypersurfaces of finite type in ℂ2, Math. Res. Lett., 12 (2005), 523–542.
M. Kolář and F. Meylan, Higher order symmetries of real hypersurfaces in ℂ3, Proc. Amer. Math. Soc., 144 (2016), 4807–4818.
M. Kolář and F. Meylan, Infinitesimal CR automorphisms for a class of polynomial models, Arch. Math., 53 (2017), 255–265.
M. Kolář and F. Meylan, Chern—Moser operators and weighted jet determination problems, in: Geometric Analysis of Several Complex Variables and Related Topics, Contemp. Math., vol. 550, Amer. Math. Soc. (Providence, RI, 2011), pp. 75–88.
M. Kolář and F. Meylan, Infinitesimal CR automorphisms of hypersurfaces of finite type in C2, Arch. Math. (Brno), 47 (2011), 367–375.
M. Kolář and F. Meylan, Nonlinear CR automorphisms of Levi degenerate hypersurfaces and a new gap phenomenon, Ann. Sc. Norm. Super. Pisa Cl. Sci. (5), 19 (2019), 847–868.
M. Kolář, F. Meylan and D. Zaitsev, Chern—Moser operators and polynomial models in CR geometry, Adv. Math., 263 (2014), 321–356.
N. G. Kruzhilin and A. V. Loboda, Linearization of local automorphisms of pseudoconvex surfaces, Dokl. Akad. Nauk SSSR, 271 (1983), 280–282 (in Russian).
B. Kruglikov, Blow-ups and infinitesimal automorphisms of CR-manifolds, Math. Z., 296 (2020), 1701–1724.
B. Kruglikov, Submaximally symmetric CR-structures, J. Geom. Anal., 26 (2016), 3090–3097.
B. Kruglikov, The gap phenomenon in parabolic geometries, J. Reine Angew. Math., 113 (2017), 153–215.
B. Lamel and N. Mir, Parametrization of local CR automorphisms by finite jets and application, J. Amer. Math. Soc., 2 (2007), 519–572.
B. Lamel and N. Mir, The finite jet determination problem for CR maps of positive codimension into Nash manifolds, https://doi.org/10.1112/plms.12439.
N. Mir and D. Zaitsev, Unique jet determination and extension of germs of CR maps into spheres, Trans. Amer. Math. Soc., 374 (2021), 2149–2166.
N. Stanton, Infinitesimal CR automorphisms of real hypersurfaces, Amer. J. Math., 118 (1996), 209–233.
A. G. Vitushkin, Real analytic hypersurfaces in complex manifolds, Russian Math. Surveys, 40 (1985), 1–35.
S. M. Webster, On the Moser normal form at a non-umbilic point, Math. Ann., 233 (1978), 97–102.
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The authors would like to thank the referee for his very careful reading and for having enriched this paper with several important remarks and useful references.
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To László Lempert for his 70th birthday
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Kolář, M., Meylan, F. Remarks on the Symmetries of a Model Hypersurface. Anal Math 48, 545–565 (2022). https://doi.org/10.1007/s10476-022-0157-3
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DOI: https://doi.org/10.1007/s10476-022-0157-3