Abstract
The equivariant CR minimal immersions from the round 3-sphere \(S^3\) into the complex projective space \(\mathbb CP^n\) have been classified by the third author explicitly (Li in J Lond Math Soc 68:223–240, 2003). In this paper, by employing the equivariant condition which implies that the induced metric is left-invariant and that all geometric properties of \(S^3=\mathrm{SU}(2)\) endowed with a left-invariant metric can be expressed in terms of the structure constants of the Lie algebra \(\mathfrak {su}(2)\), we establish an extended classification theorem for equivariant CR minimal immersions from the 3-sphere \(S^3\) into \(\mathbb CP^n\) without the assumption of constant sectional curvatures.
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References
Bejancu, A.: Gemetry of CR-Submaniflds. D. Reidel Publishing Company, Dordrecht (1986)
Bolton, J., Jensen, G.R., Rigoli, M., Woodward, L.M.: On conformal minimal immersions of \(\mathbb{S}^2\) into \(\mathbb{C}P^n\). Math. Ann. 279, 599–620 (1988)
Chen, B.-Y., Dillen, F., Verstraelen, L., Vrancken, L.: An exotic totally real minimal immersions of \(S^3\) in \(\mathbb{C}P^3\) and its characterization. Proc. R. Soc. Edinb. Sect. A 126, 153–165 (1996)
Chen, B.-Y., Dillen, F., Verstraelen, L., Vrancken, L.: Lagrangian isometric immersions of a real space form \(M^n(c)\) into complex space form \(\widetilde{M}^n(c)\). Math. Proc. Camb. Philos. Soc. 124, 107–125 (1998)
Dillen, F., Li, H., Vrancken, L., Wang, X.: Lagrangian submanifolds in complex projective space with parallel second fundamental form. Pac. J. Math. 255, 79–115 (2012)
Dragomir, S., Shahid, M.H., Al-Solamy, F.R.: Geometry of Cauchy-Riemann Submanifolds. Springer, Singapore (2016)
Fei, J., Peng, C.-K., Xu, X.-W.: Equivariant totally real \(3\)-spheres in the complex projective space \(\mathbb{C}P^n\). Differ. Geom. Appl. 30, 262–273 (2012)
Hu, S., Li, K.: The minimal \(S^3\) with constant sectional curvature in \(\mathbb{C}P^n\). J. Aust. Math. Soc. 99, 63–75 (2015)
Hu, Z., Lyu, D.-L., Wang, J.: On rigidity phenomena of compact surfaces in homogeneous \(3\)-manifolds. Proc. Am. Math. Soc. 143, 3097–3109 (2015)
Jenson, G.-R., Liao, R.: Families of flat minimal tori in \(\mathbb{C}P^n\). J. Differ. Geom. 42, 113–132 (1995)
Kim, H.-S., Ryan, P.-J.: A classification of pseudo-Einstein hypersurfaces in \(\mathbb{C}P^2\). Differ. Geom. Appl. 26, 106–112 (2008)
Li, Z.-Q.: Minimal \(S^3\) with constant curvature in \(\mathbb{C}P^n\). J. Lond. Math. Soc. 68, 223–240 (2003)
Li, Z.-Q., Huang, A.-M.: Constant curved minimal CR \(3\)-spheres in \(\mathbb{C}P^n\). J. Aust. Math. Soc. 79, 1–10 (2005)
Li, Z.-Q., Peng, J.-W.: Rigidity of \(3\)-dimensional minimal CR-submanifolds with constant curvature in \(\mathbb{C}P^n\). Far East J. Math. Sci. 34, 303–315 (2009)
Li, Z.-Q., Tao, Y.-Q.: Equivariant Lagrangian mimimal \(S^3\) in \(\mathbb{C}P^3\). Acta Math. Sin. (Engl. Ser.) 22, 1215–1220 (2006)
Li, H., Vrancken, L., Wang, X.: A new characterization of the Berger sphere in complex projective space. J. Geom. Phys. 92, 129–139 (2015)
Mashimo, K.: Minimal immersions of \(3\)-dimensional sphere into spheres. Osaka J. Math. 21, 721–732 (1984)
Milnor, J.: Curvatures of left invariant metrics on Lie groups. Adv. Math. 21, 293–329 (1976)
Naitoh, H.: Isotropic submanifolds with parallel second fundamental form in \(P^m(c)\). Osaka J. Math. 18, 427–464 (1981)
Naitoh, H.: Totally real parallel submanifolds in \(P^n(c)\). Tokyo J. Math. 4, 279–306 (1981)
Naitoh, H.: Parallel submanifolds of complex space forms I. Nagoya Math. J. 90, 85–117 (1983); II, ibid, 91, 119–149 (1983)
Ogiue, K.: Differential geometry of Käehler submanifolds. Adv. Math. 13, 73–114 (1974)
Torralbo, F.: Compact minimal surfaces in the Berger spheres. Ann. Global Anal. Geom. 41, 391–405 (2012)
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The authors are greatly indebted to the referee for his/her very helpful suggestions and valuable comments.
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The first two authors were supported by Grants of NSFC-11371330 and 11771404, and the third author was supported by Grant of NSFC-11361041.
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Hu, Z., Yin, J. & Li, Z. Equivariant CR minimal immersions from \(S^3\) into \(\mathbb CP^n\). Ann Glob Anal Geom 54, 1–24 (2018). https://doi.org/10.1007/s10455-017-9590-0
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DOI: https://doi.org/10.1007/s10455-017-9590-0