We prove that any positive elementary (least fixed point) induction expressing the negation of transitive closure on finite nondirected graphs requires at least two recursion variables.
Publié le : 1995-06-14
Classification:
Finite model theory,
computational expressibility,
pebble games,
transitive closure,
connectivity,
fixedpoint logic,
number of variables
@article{1183744743,
author = {McColm, Gregory L.},
title = {The Dimension of the Negation of Transitive Closure},
journal = {J. Symbolic Logic},
volume = {60},
number = {1},
year = {1995},
pages = { 392-414},
language = {en},
url = {http://dml.mathdoc.fr/item/1183744743}
}
McColm, Gregory L. The Dimension of the Negation of Transitive Closure. J. Symbolic Logic, Tome 60 (1995) no. 1, pp. 392-414. http://gdmltest.u-ga.fr/item/1183744743/