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Contents of Volume 4, 1991

J.B. McLeod, L.A. Peletier, and J.L. Vazquez;
Solutions of a nonlinear ordinary differential equation appearing in the theory of diffusion with absorption
 
Nicholas D. Alikakos and Peter Hess;
Liapunov operators and stabilization in strongly order preserving dynamical systems
 
A. Alvino, P.L. Lions, and G. Trombetti;
Comparison results for elliptic and parabolic equations via symmetrization: A new approach
 
Kazufumi Ito, Franz Kappel, and Dietmar Salamon;
A variational approach to approximation of delay systems
 
Anne De Bouard;
Nonlinear Schroedinger equations with magnetic fields
 
V.P. Orlov;
On the stability of the zero solution of a one-dimensional mathematical model of viscoelasticity
 
V.P. Orlov and P.E. Sobolevskii;
On mathematical models of a viscoelasticity with a memory
 
Y. Kuang and H.L. Smith;
Global stability in diffusive delay Lotka-Volterra systems
 
C.A. Magalhaes;
Multiplicity results for a semilinear elliptic problem with crossing of multiple eigenvalues
 
Daniel Tataru;
Time dependent $m$-accretive operators generating differential evolutions
 
Peter Takác;
A fast diffusion equation which generates a monotone local semiflow I: Local existence and uniqueness
 
Peter Takác;
A fast diffusion equation which generates a monotone local semiflow II: Global existence and asymptotic behavior
 
A.R. Aftabizadeh and Klaus Deimling;
A three-point boundary value problem
 
W.J. Coles;
Oscillation for self--adjoint second order matrix differential equations
 
CH. G. Philos;
Integral averages and oscillation of second order sublinear differential equations
 
K. Gopalsamy, M.R.S. Kulenovic, and G. Ladas;
On a logistic equation with piecewise constant arguments
 
Viorel Barbu, Giuseppe Da Prato, and Jean Paul Zolésio;
Feedback controllability of the free boundary of the one phase Stefan problem
 
G. Barles;
A weak Bernstein method for fully non-linear elliptic equations
 
G. Barles;
Interior gradient bounds for the mean curvature equation by viscosity solutions methods
 
N. Ourada and R. Triggiani;
Uniform stabilization of the Euler-Bernoulli equation with feedback operator only in the Neumann boundary condition
 
Janet Dyson and Rosanna Villella-Bressan;
Propagation of solutions of a nonlinear functional differential equation
 
Gianluca Gorni and Gaetano Zampieri;
A class of integrable Hamiltonian systems including scattering of particles on the line with repulsive interactions
 
Masaji Watanabe and Hans G. Othmer;
Persistence of invariant tori in systems of coupled oscillators I: Regular and singular problems
 
Urszula Ledzewicz-Kowalewska;
On the optimal control problems of parabolic equations with an infinite number of variables and with equality constraints
 
Q-Heung Choi and Tacksun Jung;
On periodic solutions of the nonlinear suspension bridge equation
 
Chaitan P. Gupta;
Existence and uniqueness theorems for a fourth order boundary value problem of Sturm--Liouville type
 
Shlomo Breuer and Joseph J. Roseman;
Spatial decay results for a class of quasilinear elliptic equations of mode zero
 
Jaroslav Jaros and Takasi Kusano;
Oscillation properties of first order nonlinear functional differential equations of neutral type
 
K.N. Murty and D. Trigiante;
Existence and unicity of solutions of n-point boundary value problems
 
Dieter Bothe;
Minimal solutions of multivalued differential equations
 
Jean Michel Rakotoson;
Quasilinear elliptic problems with measures as data
 
Giuseppe Geymonat and Pierre Grisvard;
Expansions on generalized eigenvectors of operators arising in the theory of elasticity
 
Alberto Bressan;
Selections of Lipschitz multifunctions generating a continuous flow
 
Rejeb Hadiji and Roger Lewandowski;
The sign of Lagrange multiplier for some minimization problem
 
M. Fuhrman;
Bounded solutions for abstract time-periodic parabolic equations with nonconstant domains
 
Satoru Murakami;
Exponential asymptotic stability for scalar linear Volterra equations
 
Gustavo Ponce;
On the global well-posedness of the Benjamin-Ono equation
 
Hans G. Kaper, Mariette Knaap, and Man Kam Kwong;
Existence theorems for second order boundary value problems
 
Chris Cosner and Philip W. Schaefer;
Some comparison principles for weakly coupled systems of elliptic equations
 
Patrick J. Rabier and Werner C. Rheinboldt;
A general existence and uniqueness theory for implicit differential-algebraic equations
 
Man Kam Kwong and Liqun Zhang;
Uniqueness of the positive solution of $\Delta u + f(u) =0$ in an annulus
 
Sung S. Kim and Kil H. Kwon;
Generalized weights for orthogonal polynomials
 
L. Jódar and E. Navarro;
An explicit closed form solution for systems of Volterra integral equations
 
Yuncheng You;
Boundary stabilization of two-dimensional Petrovsky equation: Vibrating plate
 
Yanping Lin and Hong-Ming Yin;
A mixed type boundary problem describing the propagation of disturbances in viscous media
 
LL G. Chambers;
Bounds for solutions of integral equations of second type
 
Liviu I. Nicolaescu;
A weighted semilinear elliptic equation involving critical Sobolev exponents
 
Viorel Barbu;
Null controllability of first order quasilinear equations
 
R. Triggiani;
Lack of exact controllability for wave and plate equations with finitely many boundary controls
 
Vincenzo Ferone and M. Rosaria Posteraro;
Maximization on classes of functions with fixed rearrangement
 
A.C. Lazer and P.J. McKenna;
Nonresonance conditions for the existence, uniqueness, and stability of periodic solutions of differential equations with a symmetric nonlinearities
 
Milan Miklavcic;
Eigenvalues of the Orr-Sommerfeld equation
 
Gianni Dal Maso and Franco Rampazzo;
On systems of ordinary differential equations with measures as controls
 
C. Maffei, V. Moauro, and P. Negrini;
On the inversion of the Lagrange-Dirichlet theorem in a case of nonhomogeneous potential
 
I.G. Rosen and Chien-Hua Frank Su;
An approximation theory for the identification of linear thermoelastic systems
 
Nobuyuki Kenmochi;
Asymptotic stability for nonlinear degenerate parabolic equations with Neumann boundary conditions
 
Lige Li and Roger Logan;
Positive solutions to general elliptic competition models
 
Sebastian Anita;
Existence and uniqueness for the population dynamics with nonlinear diffusion
 
Michael W. Smiley;
Complex-valued time-periodic solutions and breathers of nonlinear wave equations
 
Tuan Seng Chew and Francisco Flordeliza;
On x'=f(t,x) and Henstock--Kurzweil integrals
 
Hong-Ming Yin;
A free boundary problem describing an irreversible crystallization process
 
S. Umamaheswaram and M. Venkata Rama;
Existence theorems for focal boundary value problems
 
Y.S. Choi;
A singular boundary value problem arising from near-ignition analysis of flame structure
 
A. Debussche and R. Temam;
Inertial manifolds and the slow manifolds in meteorology
 
Klaus Schmitt and ZhiQiang Wang;
On bifurcation from infinity for potential operators
 
Alessandro Fonda, Jean-Pierre Gossez, and Fabio Zanolin;
On a nonresonance condition for a semilinear elliptic problem
 
Marco Luigi Bernardi, Fabio Luterotti, and Gianni Arrigo Pozzi;
On a class of singular or degenerate hyperbolic variational inequalities
 
Giorgio Gentili;
Dissipativity conditions and variational principles for the heat flux equation with memory
 
Renato Spigler and Marco Vianello;
Global existence and uniqueness for the Kummer transformation problem subject to non Cauchy data
 
Angelo Favini and Enrico Obrecht;
Conditions for parabolicity of second order abstract differential equations
 
D. Lupo and A.M. Micheletti;
An application to bifurcation problems of cusps in Banach spaces
 
Vincenzo Vespri;
Abstract quasilinear parabolic equations with variable domains
 
C. De Coster, C. Fabry, and P. Habets;
An abstract approach to a class of nonlinear boundary value problems
 
Victor A. Galaktionov;
Monotonicity in time at the single point for the semilinear heat equation with source
 
Qingguang Huang;
Comparison theorems for first order retarded functional differential equations and their applications
 
G. Ladas, Ch. G. Philos, and Y.G. Sficas;
Oscillations of integro-differential equations
 
Vilmos Komornik;
On the exact controllability of Kirchoff plates
 
M. Comte and M.C. Knaap;
Existence of solutions of elliptic equations involving critical Sobolev exponents with Neumann boundary condition in general domains
 
Patrick Saint-Pierre;
Viability of boundary of the viability kernel
 
Olivier Rey;
Blow-up points of solutions to elliptic equations with limiting nonlinearity
 
Isabelle Flahaut;
Approximate inertial manifolds for the Sine-Gordon equation
 
K. Peiffer;
A remark on the stability of steady state motions
 
Jianfu Yang;
Positive solutions of a semilinear elliptic equation and its asymptotic behaviour
 
W. Eberhard and G. Freiling;
Necessary conditions for the convergence and summability of eigenfunction expansions in the complex domain
 
Eva Sanchez, Ovide Arino, and Marek Kimmel;
Noncompact semigroups of operators generated by cell kinetics models
 
Catalin Popa;
Trotter product formulae for Hamilton-Jacobi equations in infinite dimensions
 
T.A. Burton and V. Hutson;
Permanence for non-autonomous predator-prey systems
 
Marta Garcia-Huidobro;
Jumping nonlinearities for a nonlinear equation with an n-th order disconjugate operator
 
J.V.A. Goncalves and O.H. Miyagaki;
Remarks on semilinear elliptic problems at resonance
 
Wenzhang Huang;
On asymptotic stability for linear delay equations
 
Allan D. Bennett;
Continuous dependence on modeling in the Cauchy problem for nonlinear elliptic equations
 
Jianhong Wu;
Semigroup and integral form of a class of partial differential equations with infinite delay
 
Fathi M.A. Salam, Stephen A. Van Gils, and Zhang Zhi-fen;
Global bifurcation analysis of an adaptive control system
 
Jerry U. Onwuatu;
On controllability and null controllability of linear systems with distributed delays in the control
 
Donal O' Regan;
Singular third-order boundary value problems
 
Elias Flytzanis and Nikolaos S. Papageorgiou;
On the existence of optimal controls for a class of nonlinear infinite dimensional systems