TY - JOUR
T1 - On the unboundedness of the ratio of species and resources for the diffusive logistic equation
AU - Inoue, Jumpei
AU - Kuto, Kousuke
N1 - Funding Information:
2020 Mathematics Subject Classification. Primary: 35Q92, 35B30; Secondary: 35B09, 35B40. Key words and phrases. Diffusive logistic equation, elliptic equations, the sub-super solution method, radial solutions, mathematical ecology. The second author is supported by JSPS KAKENHI Grant-in-Aid Grant Number 19K03581. ∗ Corresponding author: Jumpei Inoue.
Publisher Copyright:
© 2021 American Institute of Mathematical Sciences. All rights reserved.
PY - 2021/5
Y1 - 2021/5
N2 - Concerning a class of diffusive logistic equations, Ni [1, Abstract] proposed an optimization problem to consider the supremum of the ratio of the L1 norms of species and resources by varying the diffusion rates and the profiles of resources, and moreover, he gave a conjecture that the supremum is 3 in the one-dimensional case. In [1], Bai, He and Li proved the validity of this conjecture. The present paper shows that the supremum is infinity in a case when the habitat is a multi-dimensional ball. Our proof is based on the sub-super solution method. A key idea of the proof is to construct an L1 unbounded sequence of sub-solutions.
AB - Concerning a class of diffusive logistic equations, Ni [1, Abstract] proposed an optimization problem to consider the supremum of the ratio of the L1 norms of species and resources by varying the diffusion rates and the profiles of resources, and moreover, he gave a conjecture that the supremum is 3 in the one-dimensional case. In [1], Bai, He and Li proved the validity of this conjecture. The present paper shows that the supremum is infinity in a case when the habitat is a multi-dimensional ball. Our proof is based on the sub-super solution method. A key idea of the proof is to construct an L1 unbounded sequence of sub-solutions.
KW - Diffusive logistic equation
KW - Elliptic equations
KW - Mathematical ecology
KW - Radial solutions
KW - The sub-super solution method
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U2 - 10.3934/dcdsb.2020186
DO - 10.3934/dcdsb.2020186
M3 - Article
AN - SCOPUS:85104596283
SN - 1531-3492
VL - 26
SP - 2441
EP - 2450
JO - Discrete and Continuous Dynamical Systems - Series B
JF - Discrete and Continuous Dynamical Systems - Series B
IS - 5
ER -