Journal of Logic and Computation Advance Access published online on September 17, 2009
Journal of Logic and Computation, doi:10.1093/logcom/exp059
Original Papers |
On the Structure of Finite Integral Commutative Residuated Chains
ík
Institute of Computer Science, Academy of Sciences of the Czech Republic, Pod Vodárenskou v
í 2, 182 07 Prague 8, Czech Republic; Department of Mathematics, Faculty of Electrical Engineering, Czech Technical University in Prague, Technická 2, 166 27 Prague 6, Czech Republic.
E-mail: horcik{at}cs.cas.cz
Received 8 December 2008.
Among the class of finite integral commutative residuated chains (ICRCs), we identify those algebras which can be obtained as a nuclear retraction of a conuclear contraction of a totally ordered Abelian
-group. We call the ICRCs satisfying this condition regular. Then we discuss the structure of finite regular ICRCs. Finally, we prove that the class of regular members generate a strictly smaller variety than the variety generated by ICRCs.
Keywords: Residuated lattice; ordered residuated monoid; nucleus; conucleus,Abelian lattice-ordered group; free commutative monoid
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