Preface
Approximation of set-valued functions by continuous functions
Global phase- portrait of a plane autonomous system
Characterizations of a Class of Convex Sets.
Zdzisław Opial---a mathematician 1930--1974
Preface, Contents, Participants and authors
A Jacobian condition for injectivity of differentiable plane maps
Contents
A class of globally univalent differentiable mappings
Global asymptotic stability for plane polynomial flows
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