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A mathematical study of diffusive logistic equations with mixed type boundary conditions
Institute of Mathematics, University of Tsukuba, Tsukuba 305–8571, Japan |
The purpose of this paper is to provide a careful and accessible exposition of static bifurcation theory for a class of mixed type boundary value problems for diffusive logistic equations with indefinite weights, which model population dynamics in environments with spatial heterogeneity. We discuss the changes that occur in the structure of the positive solutions as a parameter varies near the first eigenvalue of the linearized problem, and prove that the most favorable situations will occur if there is a relatively large favorable region (with good resources and without crowding effects) located some distance away from the boundary of the environment. A biological interpretation of main theorem is that an initial population will grow exponentially until limited by lack of available resources if the diffusion rate is below some critical value; this idea is generally credited to the English economist T. R. Malthus. On the other hand, if the diffusion rate is above this critical value, then the model obeys the logistic equation introduced by the Belgian mathematical biologist P. F. Verhulst. The approach in this paper is distinguished by the extensive use of the ideas and techniques characteristic of the recent developments in partial differential equations.
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show all references
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R. A. Adams and J. J. F. Fournier, Sobolev Spaces, 2nd edition, Pure and Applied Mathematics, Vol. 140, Elsevier/Academic Press, Amsterdam, 2003. |
[2] |
G. A. Afrouzi and K. J. Brown,
On principal eigenvalues for boundary value problems with indefinite weight and Robin boundary conditions, Proc. Amer. Math. Soc., 127 (1999), 125-130.
doi: 10.1090/S0002-9939-99-04561-X. |
[3] |
H. Amann,
Fixed point equations and nonlinear eigenvalue problems in ordered Banach spaces, SIAM Rev., 18 (1976), 620-709.
doi: 10.1137/1018114. |
[4] |
H. Amann,
Nonlinear elliptic equations with nonlinear boundary conditions, North-Holland Math. Studies, 21 (1976), 43-63.
|
[5] |
A. Ambrosetti and A. Malchiodi, Nonlinear Analysis and Semilinear Elliptic Problems, Cambridge Studies in Advanced Mathematics, No. 104, Cambridge University Press, Cambridge, 2007.
doi: 10.1017/CBO9780511618260.![]() ![]() ![]() |
[6] |
A. Ambrosetti and G. Prodi, A Primer of Nonlinear Analysis, Cambridge Studies in Advanced Mathematics, No. 34, Cambridge University Press, Cambridge, 1995.
![]() ![]() |
[7] |
J. Bergh and J. Löfström, Interpolation Spaces, An Introduction, Springer-Verlag, Berlin Heidelberg New York, 1976. |
[8] |
J.-M. Bony,
Principe du maximum dans les espaces de Sobolev, C. R. Acad. Sc. Paris, 265 (1967), 333-336.
|
[9] |
K. J. Brown and S. S. Lin,
On the existence of positive eigenfunctions for an eigenvalue problem with indefinite weight function, J. Math. Anal. Appl., 75 (1980), 112-120.
doi: 10.1016/0022-247X(80)90309-1. |
[10] |
R. F. Brown, A Topological Introduction to Nonlinear Analysis, 3$^{rd}$ edition, Springer, Cham, 2014.
doi: 10.1007/978-3-319-11794-2. |
[11] |
R. S. Cantrell and C. Cosner,
Diffusive logistic equations with indefinite weights: Population models in disrupted environments, Proc. Roy. Soc. Edinburgh Sect. A, 112 (1989), 293-318.
doi: 10.1017/S030821050001876X. |
[12] |
K.-C. Chang, Methods in Nonlinear Analysis, Springer Monogr. Math., Springer-Verlag, Berlin, 2005. |
[13] |
I. Chavel, Eigenvalues in Riemannian Geometry, Pure and Applied Mathematics, 115. Academic Press, Inc., Orlando, FL, 1984.
![]() ![]() |
[14] |
J. Chazarain and A. Piriou, Introduction à La Théorie Des Équations Aux Dérivées Partielles Linéaires, Gauthier-Villars, Paris, 1981. |
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M. G. Crandall and P. H. Rabinowitz,
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[17] |
M. G. Crandall and P. H. Rabinowitz,
Bifurcation, perturbation of simple eigenvalues, and linearized stability, Arch. Rational Mech. Anal., 52 (1973), 161-180.
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E. N. Dancer,
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|
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J. M. Fraile, P. Koch Medina, J. López-Gómez and S. Merino,
Elliptic eigenvalue problems and unbounded continua of positive solutions of a semilinear elliptic equation, J. Differential Equations, 127 (1996), 295-319.
doi: 10.1006/jdeq.1996.0071. |
[24] |
J. García-Melián, R. Gómez-Reñasco, J. López-Gómez and J. C. Sabina de Lis,
Pointwise growth and uniqueness of positive solutions for a class of sublinear elliptic problems where bifurcation from infinity occurs, Arch. Rational Mech. Anal., 145 (1998), 261-289.
doi: 10.1007/s002050050130. |
[25] |
J. García-Melián, J. D. Rossi and J. C. Sabina de Lis,
Existence and uniqueness of positive solutions to elliptic problems with sublinear mixed boundary conditions, Commun. Contemp. Math., 11 (2009), 585-613.
doi: 10.1142/S0219199709003508. |
[26] |
D. Gilbarg and N. S. Trudinger, Elliptic Partial Differential Equations of Second Order, Reprint of the 1998 edition. Classics in Mathematics. Springer-Verlag, Berlin, 2001. |
[27] |
I. C. Gohberg and M. G. Kreĭn, The basic propositions on defect numbers, root numbers and indices of linear operators, Uspehi Mat. Nauk., 12 (1957), 43–118; English translation: Amer. Math. Soc. Transl., 13 (1960), 185–264.
doi: 10.1090/trans2/013/08. |
[28] |
P. Hess, Periodic-Parabolic Boundary Value Problems and Positivity, Pitman Research Notes in Mathematical Series, 247, Longman Scientific & Technical, Harlow, New York, 1991. |
[29] |
P. Hess and T. Kato,
On some linear and nonlinear eigenvalue problems with an indefinite weight function, Comm. Partial Differential Equations, 5 (1980), 999-1030.
doi: 10.1080/03605308008820162. |
[30] |
L. Hörmander, The Analysis of Linear Partial Differential Operators III, Grundlehren der mathematischen Wissenschaften [Fundamental Principles of Mathematical Sciences], 274. Springer-Verlag, Berlin, 1994. |
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M. A. Krasnosel'skii, Positive Solutions of Operator Equations, P. Noordhoff, Groningen, 1964. |
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[33] |
O. A. Ladyzhenskaya, V. A. Solonnikov and N. N. Ural'tseva, Linear and Quasilinear Equations of Parabolic Type, Translations of Mathematical Monographs, Vol. 23, American Mathematical Society, Providence, Rhode Island 1968. |
[34] |
O. A. Ladyzhenskaya and N. N. Ural'tseva, Linear and Quasilinear Equations of Elliptic Type, Nauka, Moscow, 1964 (Russian), English translation; Academic Press, New York London, 1968.
![]() ![]() |
[35] |
J. López-Gómez,
Metasolutions: Malthus versus Verhulst in population dynamics, A dream of Volterra, Elsevier/North-Holland, Amsterdam, Stationary Partial Differential Equations, 2 (2005), 211-309.
doi: 10.1016/S1874-5733(05)80012-9. |
[36] |
J. López-Gómez, Linear Second Order Elliptic Operators, World Scientific Publishing, Co. Pte. Ltd., Hackensack, NJ, 2013.
doi: 10.1142/8664. |
[37] |
J. López-Gómez and J. C. Sabina de Lis,
First variations of principal eigenvalues with respect to the domain and point-wise growth of positive solutions for problems where bifurcation from infinity occurs, J. Differential Equations, 148 (1998), 47-64.
doi: 10.1006/jdeq.1998.3456. |
[38] |
A. Manes and A. M. Micheletti,
Un'estensione della teoria variazionale classica degli autovalori per operatori ellitici del secondo ordine, Boll. Un. Mat. Ital., 7 (1973), 285-301.
|
[39] |
J. Moser,
A new proof of de Giorgi's theorem concerning the regularity problem for elliptic differential equations, Comm. Pure Appl. Math., 13 (1960), 457-468.
doi: 10.1002/cpa.3160130308. |
[40] |
L. Nirenberg, Topics in Nonlinear Functional Analysis, New York University, Courant Institute of Mathematical Sciences, New York; revised reprint of the 1974 original, Courant Lecture Notes in Mathematics, No, 6, American Mathematical Society, Providence, Rhode Island, 2001.
doi: 10.1090/cln/006. |
[41] |
T.-C. Ouyang,
On the positive solutions of semilinear equations $\Delta u+\lambda u-hu^{p} = 0$ on the compact manifolds, Trans. Amer. Math. Soc., 331 (1992), 503-527.
doi: 10.2307/2154124. |
[42] |
C. V. Pao, Nonlinear Parabolic and Elliptic Equations, Plenum Press, New York London, 1992.
![]() ![]() |
[43] |
M. H. Protter and H. F. Weinberger, Maximum Principles in Differential Equations, Corrected reprint of the 1967 original. Springer-Verlag, New York, 1984.
doi: 10.1007/978-1-4612-5282-5. |
[44] |
P. H. Rabinowitz,
Some aspects of nonlinear eigenvalue problems, Rocky Mountain J. Math., 3 (1973), 161-202.
doi: 10.1216/RMJ-1973-3-2-161. |
[45] |
R. Redlinger,
Über die $C^{2}$-Kompaktheit der Bahn von Lösungen semilinearer parabolischer systeme, Proc. Roy. Soc. Edinburgh, 93 (1982/83), 99-103.
doi: 10.1017/S0308210500031693. |
[46] |
M. Reed and B. Simon, Methods of Modern Mathematical Physics IV: Analysis of Operators, Academic Press, New York San Francisco London, 1978.
![]() ![]() |
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Term | Biological interpretation |
D | Terrain |
x | Location of the terrain |
u(x) | Population density of a species inhabiting the terrain |
∆ | A member of the population moves about the terrain via the type of random walks occurring in Brownian motion |
Rate of diffusive dispersal | |
m(x) | Intrinsic growth rate |
h(x) | Coefficient of intraspecific competition |
Term | Biological interpretation |
D | Terrain |
x | Location of the terrain |
u(x) | Population density of a species inhabiting the terrain |
∆ | A member of the population moves about the terrain via the type of random walks occurring in Brownian motion |
Rate of diffusive dispersal | |
m(x) | Intrinsic growth rate |
h(x) | Coefficient of intraspecific competition |
Boundary Condition | Biological interpretation |
Dirichlet case (a(x') ≡ 0, b(x') ≡ 1) |
Completely hostile (deadly) exterior |
Neumann case (a(x') ≡ 1, b(x') ≡ 0) |
Barrier |
Robin or mixed-type case (a(x') + b(x') > 0) |
Hostile but not completely deadly exterior |
Boundary Condition | Biological interpretation |
Dirichlet case (a(x') ≡ 0, b(x') ≡ 1) |
Completely hostile (deadly) exterior |
Neumann case (a(x') ≡ 1, b(x') ≡ 0) |
Barrier |
Robin or mixed-type case (a(x') + b(x') > 0) |
Hostile but not completely deadly exterior |
Problems | Conditions | Theorems |
(6) (mixed type case) |
(M.1) (H.1), (H.2) | Theorem 1.3 for λ1(m) |
(55) (Dirichlet case) |
(M.1) | Theorem 6.1 for γ1(m) |
(58) (Neumann case) |
(M.2) | Theorem 6.2 for ν1(m) |
(56), (59), (61) | (M.1), (M.2) (H.1), (H.2) |
Theorem 6.3 for µD(λ), µN(λ), µ1(λ) |
Problems | Conditions | Theorems |
(6) (mixed type case) |
(M.1) (H.1), (H.2) | Theorem 1.3 for λ1(m) |
(55) (Dirichlet case) |
(M.1) | Theorem 6.1 for γ1(m) |
(58) (Neumann case) |
(M.2) | Theorem 6.2 for ν1(m) |
(56), (59), (61) | (M.1), (M.2) (H.1), (H.2) |
Theorem 6.3 for µD(λ), µN(λ), µ1(λ) |
Problems | Conditions | Theorems |
(1) (mixed type case) |
(M.1) (Z.1), (Z.2) (H.1), (H.2) |
Theorem 1.5 for u(λ) |
(91) (Dirichlet case) |
(M.1) (Z.1), (Z.2) |
Theorem 8.1 for v(λ) |
(93) (Neumann case) |
(M.2) (Z.1), (Z.2) |
Theorem 8.2 for w(λ) |
(1), (91), (93) | (M.1), (M.2) (Z.1), (Z.2) (H.1), (H.2) |
Theorem 8.3 for v(λ), w(λ), u(λ) |
(1) (mixed type case) |
(M.1), (Z.3) (H.1), (H.2) |
Theorem 1.6 for u(λ) |
Problems | Conditions | Theorems |
(1) (mixed type case) |
(M.1) (Z.1), (Z.2) (H.1), (H.2) |
Theorem 1.5 for u(λ) |
(91) (Dirichlet case) |
(M.1) (Z.1), (Z.2) |
Theorem 8.1 for v(λ) |
(93) (Neumann case) |
(M.2) (Z.1), (Z.2) |
Theorem 8.2 for w(λ) |
(1), (91), (93) | (M.1), (M.2) (Z.1), (Z.2) (H.1), (H.2) |
Theorem 8.3 for v(λ), w(λ), u(λ) |
(1) (mixed type case) |
(M.1), (Z.3) (H.1), (H.2) |
Theorem 1.6 for u(λ) |
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