Full paper in PDF:
$%F. Acquistapace, C. Andradas, and F. Broglia, Classification of obstructions for separation of semialgebraic sets in dimension 3, Rev. Mat. Univ. Complut. Madrid 10 (1997), supplementary, 2749.%$

Classification of Obstructions for Separation of Semialgebraic Sets in Dimension 3
F. ACQUISTAPACE, C. ANDRADAS,
and F. BROGLIA
Dipartimento di Matematica
Università di Pisa
Via F. Bunarroti 2
56127 Pisa -- Italy
Departamento de Álgebra
Universidad Complutense

ABSTRACT

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.