Full paper in PDF:
$%F. Acquistapace, C. Andradas, and F. Broglia, Classification of obstructions for separation of
semialgebraic sets in dimension 3, Rev. Mat. Univ. Complut. Madrid 10 (1997), supplementary,
27–49.%$
Dipartimento di Matematica Università di Pisa Via F. Bunarroti 2 56127 Pisa -- Italy | Departamento de Álgebra Universidad Complutense |
Applying general results on separation of semialgebraic sets and spaces of orderings, we produce a catalogue of all possible geometric obstructions for separation of 3-dimensional semialgebraic sets and give some hints on how separation can be made decidable.
1991 Mathematics Subject Classification: 14P10.