TY - JOUR

T1 - On the boundedness and the asymptotic behaviour of the non-negative solutions of Volterra-Hammerstein integral equations

AU - Thieme, Horst R.

PY - 1980/8/1

Y1 - 1980/8/1

N2 - We study the Volterra-Hammerstein integral equation {Mathematical expression} t≥0, x∈D. We derive sufficient conditions for the boundedness of all non-negative solutions U. We show that, for bounded non-negative solutions U, U(t,.) is positive on D for sufficiently large t>0, if we impose appropriate positivity assumptions on f and h. If we additionally assume that, for y∈D, rf(y,r) strictly monotone increases and f(y,r)/r strictly monotone decreases as r>0 increases, the following alternative holds for any bounded non-negative solution U: Either U(t,.) converges toward zero for t→∞, pointwise on D, or U(t,.) converges, for t→∞, toward the unique bounded positive solution of the corresponding Hammerstein integral equation, uniformly on D. We indicate conditions for the occurrence of each of the two cases.

AB - We study the Volterra-Hammerstein integral equation {Mathematical expression} t≥0, x∈D. We derive sufficient conditions for the boundedness of all non-negative solutions U. We show that, for bounded non-negative solutions U, U(t,.) is positive on D for sufficiently large t>0, if we impose appropriate positivity assumptions on f and h. If we additionally assume that, for y∈D, rf(y,r) strictly monotone increases and f(y,r)/r strictly monotone decreases as r>0 increases, the following alternative holds for any bounded non-negative solution U: Either U(t,.) converges toward zero for t→∞, pointwise on D, or U(t,.) converges, for t→∞, toward the unique bounded positive solution of the corresponding Hammerstein integral equation, uniformly on D. We indicate conditions for the occurrence of each of the two cases.

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U2 - 10.1007/BF02320701

DO - 10.1007/BF02320701

M3 - Article

AN - SCOPUS:33748290281

SN - 0025-2611

VL - 31

SP - 379

EP - 412

JO - Manuscripta Mathematica

JF - Manuscripta Mathematica

IS - 4

ER -