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The relative coincidence Nielsen number

Jerzy Jezierski (1996)

Fundamenta Mathematicae

We define a relative coincidence Nielsen number N r e l ( f , g ) for pairs of maps between manifolds, prove a Wecken type theorem for this invariant and give some formulae expressing N r e l ( f , g ) by the ordinary Nielsen numbers.

The Wecken property of the projective plane

Boju Jiang (1999)

Banach Center Publications

A proof is given of the fact that the real projective plane P 2 has the Wecken property, i.e. for every selfmap f : P 2 P 2 , the minimum number of fixed points among all selfmaps homotopic to f is equal to the Nielsen number N(f) of f.

Trees of manifolds with boundary

Paweł Zawiślak (2015)

Colloquium Mathematicae

We introduce two new classes of compacta, called trees of manifolds with boundary and boundary trees of manifolds with boundary. We establish their basic properties.

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