Homology, Homotopy and Applications

Volume 13 (2011)

Number 1

Erratum to “Dicovering spaces”

Pages: 403 – 406

DOI: https://dx.doi.org/10.4310/HHA.2011.v13.n1.a1


Lisbeth Fajstrup (Department of Mathematical Sciences, Aalborg University, Aalborg East, Denmark)


In [1] (L. Fajstrup, Dicovering spaces, Homology Homotopy Appl. 5 (2003), no. 2, 1-17), we study coverings in the setting of directed topology. Unfortunately, there is a condition missing in the definition of a directed covering. Some of the results in [1] require this extra condition and in fact it was claimed to follow from the original definition. It is the purpose of this note to give the right definition and point out how this affects the statements in that paper. Moreover, we give an example of a dicovering in the sense of [1], which does not satisfy the extra condition. Fortunately, with the extra condition, the subsequent results are now correct.


covering spaces, abstract homotopy theory, dihomotopy theory

2010 Mathematics Subject Classification

51H15, 54Exx, 57M10

Published 12 July 2011