On the microscopic spacetime convexity principle for fully nonlinear parabolic equations II: Spacetime quasiconcave solutions

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September 2016, 36(9): 4761-4811. doi: 10.3934/dcds.2016007

On the microscopic spacetime convexity principle for fully nonlinear parabolic equations II: Spacetime quasiconcave solutions

1.	Department of Applied Mathematics, Zhejiang University of Technology, Hangzhou, 310023, Zhejiang Province, China

Received November 2014 Revised March 2016 Published May 2016

Abstract
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In [13], Chen-Ma-Salani established the strict convexity of spacetime level sets of solutions to heat equation in convex rings, using the constant rank theorem and a deformation method. In this paper, we generalize the constant rank theorem in [13] to fully nonlinear parabolic equations, that is, establish the corresponding microscopic spacetime convexity principles for spacetime level sets. In fact, the results hold for fully nonlinear parabolic equations under a general structural condition, including the $p$-Laplacian parabolic equations ($p >1$) and some mean curvature type parabolic equations.

Keywords: constant rank theorem, spacetime quasiconcave solution., Spacetime level set.

Mathematics Subject Classification: Primary: 35K10; Secondary: 35B9.

Citation: Chuanqiang Chen. On the microscopic spacetime convexity principle for fully nonlinear parabolic equations II: Spacetime quasiconcave solutions. Discrete & Continuous Dynamical Systems - A, 2016, 36 (9) : 4761-4811. doi: 10.3934/dcds.2016007

References:

[1]	L. V. Ahlfors, Conformal Invariants: Topics in Geometric Function Theory,, McGraw-Hill Series in Higher Mathematics, (1973).
[2]	B. Bian and P. Guan, A microscopic convexity principle for nonlinear partial differential equations,, Inventiones Math., 177 (2009), 307. doi: 10.1007/s00222-009-0179-5.
[3]	B. Bian, P. Guan, X. N. Ma and L. Xu, A constant rank theorem for quasiconcave solutions of fully nonlinear partial differential equations,, Indiana Univ. Math. J., 60 (2011), 101. doi: 10.1512/iumj.2011.60.4222.
[4]	C. Bianchini, M. Longinetti and P. Salani, Quasiconcave solutions to elliptic problems in convex rings,, Indiana Univ. Math. J., 58 (2009), 1565. doi: 10.1512/iumj.2009.58.3539.
[5]	C. Borell, Brownian motion in a convex ring and quasiconcavity,, Comm. Math. Phys., 86 (1982), 143. doi: 10.1007/BF01205665.
[6]	C. Borell, A note on parabolic convexity and heat conduction,, Ann. Inst. H. Poincaré Probab. Statist., 32 (1996), 387.
[7]	C. Borell, Diffusion equations and geometric inequalities,, Potential Anal., 12 (2000), 49. doi: 10.1023/A:1008641618547.
[8]	L. Caffarelli and A. Friedman, Convexity of solutions of some semilinear elliptic equations,, Duke Math. J., 52 (1985), 431. doi: 10.1215/S0012-7094-85-05221-4.
[9]	L. Caffarelli and J. Spruck, Convexity properties of solutions to some classical variational problems,, Comm. Part. Diff. Eq., 7 (1982), 1337. doi: 10.1080/03605308208820254.
[10]	S.-Y. A. Chang, X. N. Ma and P. Yang, Principal curvature estimates for the convex level sets of semilinear elliptic equations,, Discrete Contin. Dyn. Syst., 28 (2010), 1151. doi: 10.3934/dcds.2010.28.1151.
[11]	C. Q. Chen, On the microscopic spacetime convexity principle of fully nonlinear parabolic equations I: Spacetime convex solutions,, Discrete Contin. Dyn. Syst. A, 34 (2014), 3383. doi: 10.3934/dcds.2014.34.3383.
[12]	C. Q. Chen and B. W. Hu, A microscopic convexity principle for spacetime convex solutions of fully nonlinear parabolic equations,, Acta Mathematica Sinica, 29 (2013), 651. doi: 10.1007/s10114-012-1495-z.
[13]	C. Q. Chen, X. N. Ma and P. Salani, On the spacetime quasiconcave solutions of the heat equation,, preprint, ().
[14]	C. Q. Chen and S. J. Shi, Curvature estimates for the level sets of spatial quasiconcave solutions to a class of parabolic equations,, Science China Mathematics, 54 (2011), 2063. doi: 10.1007/s11425-011-4277-7.
[15]	R. Gabriel, A result concerning convex level surfaces of 3-dimensional harmonic functions,, J. London Math. Soc., 32 (1957), 286.
[16]	P. Guan and L. Xu, Convexity estimates for level surfaces of quasiconcave solutions to fully nonlinear elliptic equations,, J. Reine Angew. Math., 680 (2013), 41. doi: 10.1515/crelle.2012.038.
[17]	B. W. Hu and X. N. Ma, Constant rank theorem of the spacetime convex solution of heat equation,, manuscripta math., 138 (2012), 89. doi: 10.1007/s00229-011-0485-2.
[18]	K. Ishige and P. Salani, Parabolic quasi-concavity for solutions to parabolic problems in convex rings,, Math. Nachr., 283 (2010), 1526. doi: 10.1002/mana.200910242.
[19]	K. Ishige and P. Salani, On a new kind of convexity for solutions of parabolic problems,, Discret. Contin. Dyn. Syst. Ser. S, 4 (2011), 851. doi: 10.3934/dcdss.2011.4.851.
[20]	K. Ishige and P. Salani, Parabolic power concavity and parabolic boundary value problems,, Math. Ann., 358 (2014), 1091. doi: 10.1007/s00208-013-0991-5.
[21]	B. Kawhol, Rearrangements and Convexity of Level Sets in PDE,, Springer Lecture Notes in Math. 1150, (1150).
[22]	N. Korevaar, Convexity of level sets for solutions to elliptic ring problems,, Comm. Part. Diff. Eq., 15 (1990), 541. doi: 10.1080/03605309908820698.
[23]	J. Lewis, Capacitary functions in convex rings,, Arch. Rat. Mech. Anal., 66 (1977), 201.
[24]	G. Lieberman, Second Order Parabolic Differential Equations,, World Scientific, (1996). doi: 10.1142/3302.
[25]	M. Longinetti, Convexity of the level lines of harmonic functions,, (Italian) Boll. Un. Mat. Ital. A, 2 (1983), 71.
[26]	M. Longinetti, On minimal surfaces bounded by two convex curves in parallel planes,, J. Diff. Equations, 67 (1987), 344. doi: 10.1016/0022-0396(87)90131-8.
[27]	X. N. Ma, Q. Z. Ou and W. Zhang, Gaussian curvature estimates for the convex level sets of $p$-harmonic functions,, Comm. Pure Appl. Math., 63 (2010), 935. doi: 10.1002/cpa.20318.
[28]	M. Ortel and W. Schneider, Curvature of level curves of harmonic functions,, Canad. Math. Bull., 26 (1983), 399. doi: 10.4153/CMB-1983-066-4.
[29]	M. Shiffman, On surfaces of stationary area bounded by two circles or convex curves in parallel planes,, Annals of Math., 63 (1956), 77. doi: 10.2307/1969991.
[30]	F. Treves, A new method of proof of the subelliptic estimates,, Commun. Pure Appl. Math., 24 (1971), 71. doi: 10.1002/cpa.3160240107.
[31]	L. Xu, A microscopic convexity theorem of level sets for solutions to elliptic equations,, Cal. Var. PDE, 40 (2011), 51. doi: 10.1007/s00526-010-0333-3.

show all references

References:

[1]	L. V. Ahlfors, Conformal Invariants: Topics in Geometric Function Theory,, McGraw-Hill Series in Higher Mathematics, (1973).
[2]	B. Bian and P. Guan, A microscopic convexity principle for nonlinear partial differential equations,, Inventiones Math., 177 (2009), 307. doi: 10.1007/s00222-009-0179-5.
[3]	B. Bian, P. Guan, X. N. Ma and L. Xu, A constant rank theorem for quasiconcave solutions of fully nonlinear partial differential equations,, Indiana Univ. Math. J., 60 (2011), 101. doi: 10.1512/iumj.2011.60.4222.
[4]	C. Bianchini, M. Longinetti and P. Salani, Quasiconcave solutions to elliptic problems in convex rings,, Indiana Univ. Math. J., 58 (2009), 1565. doi: 10.1512/iumj.2009.58.3539.
[5]	C. Borell, Brownian motion in a convex ring and quasiconcavity,, Comm. Math. Phys., 86 (1982), 143. doi: 10.1007/BF01205665.
[6]	C. Borell, A note on parabolic convexity and heat conduction,, Ann. Inst. H. Poincaré Probab. Statist., 32 (1996), 387.
[7]	C. Borell, Diffusion equations and geometric inequalities,, Potential Anal., 12 (2000), 49. doi: 10.1023/A:1008641618547.
[8]	L. Caffarelli and A. Friedman, Convexity of solutions of some semilinear elliptic equations,, Duke Math. J., 52 (1985), 431. doi: 10.1215/S0012-7094-85-05221-4.
[9]	L. Caffarelli and J. Spruck, Convexity properties of solutions to some classical variational problems,, Comm. Part. Diff. Eq., 7 (1982), 1337. doi: 10.1080/03605308208820254.
[10]	S.-Y. A. Chang, X. N. Ma and P. Yang, Principal curvature estimates for the convex level sets of semilinear elliptic equations,, Discrete Contin. Dyn. Syst., 28 (2010), 1151. doi: 10.3934/dcds.2010.28.1151.
[11]	C. Q. Chen, On the microscopic spacetime convexity principle of fully nonlinear parabolic equations I: Spacetime convex solutions,, Discrete Contin. Dyn. Syst. A, 34 (2014), 3383. doi: 10.3934/dcds.2014.34.3383.
[12]	C. Q. Chen and B. W. Hu, A microscopic convexity principle for spacetime convex solutions of fully nonlinear parabolic equations,, Acta Mathematica Sinica, 29 (2013), 651. doi: 10.1007/s10114-012-1495-z.
[13]	C. Q. Chen, X. N. Ma and P. Salani, On the spacetime quasiconcave solutions of the heat equation,, preprint, ().
[14]	C. Q. Chen and S. J. Shi, Curvature estimates for the level sets of spatial quasiconcave solutions to a class of parabolic equations,, Science China Mathematics, 54 (2011), 2063. doi: 10.1007/s11425-011-4277-7.
[15]	R. Gabriel, A result concerning convex level surfaces of 3-dimensional harmonic functions,, J. London Math. Soc., 32 (1957), 286.
[16]	P. Guan and L. Xu, Convexity estimates for level surfaces of quasiconcave solutions to fully nonlinear elliptic equations,, J. Reine Angew. Math., 680 (2013), 41. doi: 10.1515/crelle.2012.038.
[17]	B. W. Hu and X. N. Ma, Constant rank theorem of the spacetime convex solution of heat equation,, manuscripta math., 138 (2012), 89. doi: 10.1007/s00229-011-0485-2.
[18]	K. Ishige and P. Salani, Parabolic quasi-concavity for solutions to parabolic problems in convex rings,, Math. Nachr., 283 (2010), 1526. doi: 10.1002/mana.200910242.
[19]	K. Ishige and P. Salani, On a new kind of convexity for solutions of parabolic problems,, Discret. Contin. Dyn. Syst. Ser. S, 4 (2011), 851. doi: 10.3934/dcdss.2011.4.851.
[20]	K. Ishige and P. Salani, Parabolic power concavity and parabolic boundary value problems,, Math. Ann., 358 (2014), 1091. doi: 10.1007/s00208-013-0991-5.
[21]	B. Kawhol, Rearrangements and Convexity of Level Sets in PDE,, Springer Lecture Notes in Math. 1150, (1150).
[22]	N. Korevaar, Convexity of level sets for solutions to elliptic ring problems,, Comm. Part. Diff. Eq., 15 (1990), 541. doi: 10.1080/03605309908820698.
[23]	J. Lewis, Capacitary functions in convex rings,, Arch. Rat. Mech. Anal., 66 (1977), 201.
[24]	G. Lieberman, Second Order Parabolic Differential Equations,, World Scientific, (1996). doi: 10.1142/3302.
[25]	M. Longinetti, Convexity of the level lines of harmonic functions,, (Italian) Boll. Un. Mat. Ital. A, 2 (1983), 71.
[26]	M. Longinetti, On minimal surfaces bounded by two convex curves in parallel planes,, J. Diff. Equations, 67 (1987), 344. doi: 10.1016/0022-0396(87)90131-8.
[27]	X. N. Ma, Q. Z. Ou and W. Zhang, Gaussian curvature estimates for the convex level sets of $p$-harmonic functions,, Comm. Pure Appl. Math., 63 (2010), 935. doi: 10.1002/cpa.20318.
[28]	M. Ortel and W. Schneider, Curvature of level curves of harmonic functions,, Canad. Math. Bull., 26 (1983), 399. doi: 10.4153/CMB-1983-066-4.
[29]	M. Shiffman, On surfaces of stationary area bounded by two circles or convex curves in parallel planes,, Annals of Math., 63 (1956), 77. doi: 10.2307/1969991.
[30]	F. Treves, A new method of proof of the subelliptic estimates,, Commun. Pure Appl. Math., 24 (1971), 71. doi: 10.1002/cpa.3160240107.
[31]	L. Xu, A microscopic convexity theorem of level sets for solutions to elliptic equations,, Cal. Var. PDE, 40 (2011), 51. doi: 10.1007/s00526-010-0333-3.

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