Fixed point theory on extension-type spaces and essential maps on topological spaces

by Donal O'Regan
Published 2004-03-01

Construction of upper and lower solutions for singular discrete initial and boundary value problems via inequality theory

by Donal O'Regan, Haishen Lü
Published 2005-05-01

A Dual of the Compression-Expansion Fixed Point Theorems

by Donal O'Regan, Johnny Henderson, Richard Avery
Published 2007-11-01

Multiple positive solutions of singular discrete p-Laplacian problems via variational methods

by Donal O'Regan, Kanishka Perera, Ravi P. Agarwal
Published 2005-05-01

Multiplicity Results via Topological Degree for Impulsive Boundary Value Problems under Non-Well-Ordered Upper and Lower Solution Conditions

by R. P. Agarwal, Donal O'Regan, Xu Xian
Published 2008-10-01

On the oscillation of certain third-order difference equations

by Donal O'Regan, Said R. Grace, Ravi P. Agarwal
Published 2005-09-01

Dead Core Problems for Singular Equations with Æ-Laplacian

by Svatoslav Staněk, Donal O'Regan, Ravi P. Agarwal
Published 2007-12-01