We give a geometric representation of free De Morgan bisemigroups, free commutative De Morgan bisemigroups, and free De Morgan bisemilattices by using labeled graphs.
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2000 Mathematics Subject Classification: 08A70, 08B20
This research was supported by the National Foundation of Scientific Research of Hungary under grant no. T30511.
Communicated by M. Ito
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Ésik, Z. Free De Morgan Bisemigroups and Bisemilattices. Algebra Colloq. 10, 23–32 (2003). https://doi.org/10.1007/s100110300004
- free algebra
- De Morgan’s laws
- series-parallel graph