This is the abstract of the paper
  "On a non-uniqueness in fragmentation models"
by J. Banasiak.

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Abstract:
Equations of fragmentation describing e.g.\ the polymer
degradation, despite their apparent simplicity, have numerous non-
typical features. One of them is the existence of multiple solutions.
In this paper, applying  classical results of Hille and Phillips, we
explain their occurrence and prove that nevertheless the uniqueness
holds for a large class of physically reasonable solutions.

*****************************************************
Professor Jacek Banasiak
Department of Mathematics
and Applied Mathematics
University of Natal, Durban 4041
South Africa
tel:+27 31 2603000
fax:+27 31 2602632
e-mail: banasiak@scifs1.und.ac.za
Internet:http://macaw.cs.und.ac.za/~banasiak

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