Publications
The algebra of implicit operations. Algebra Universalis. 1989;26:16-32.Edit
McCammond's normal forms for free aperiodic semigroups revisited. LMS J. Comput. Math.. 2015;18:130-147.Edit
Profinite groups associated with weakly primitive substitutions. Fundam. Prikl. Mat.. 2005;11:13-48.Edit
Overlapping of words in rational languages. In: Combinatorics on words (Waterloo, Ont., 1982). Academic Press, Toronto, ON; 1983. 1. p. 119-131p. Edit
Profinite categories and semidirect products. J. Pure Appl. Algebra. 1998;123:1-50.Edit
Errors and grids for projected weakly singular integral equations. International Journal of Pure and Applied Mathematics . 2013;89:203-213.Edit
Tameness of some locally trivial pseudovarieties. Comm. Algebra. 2003;31:61-77.Edit
A classification of aperiodic power monoids. J. Algebra. 1994;170:355-387.Edit
Hyperdecidability of pseudovarieties of orthogroups. Glasg. Math. J.. 2001;43:67-83.Edit
QT variability and HRV interactions in ECG: Quantification and reliability. {IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING}. 2006;{53}:{1317-1329}.Edit
On direct product decompositions of finite $\scr J$-trivial semigroups. Internat. J. Algebra Comput.. 1991;1:329-337.Edit
A counterexample to a conjecture concerning concatenation hierarchies. Inform. Process. Lett.. 2009;110:4-7.Edit
Complete reducibility of systems of equations with respect to $\ssf R$. Port. Math. (N.S.). 2007;64:445-508.Edit
P wave delineation using spatially projected leads from wavelet transform loops. In: Murray A, editor. {37th Annual Conference of the Computing-in-Cardiology}. Vol {37}. {IEEE}; 2010. {. {p. 1003-1006p. }.Edit
Minimal nonpermutative pseudovarieties of semigroups. I, II. Pacific J. Math.. 1986;121:257-270, 271-279.Edit
On fixed points of the lower set operator. Int. J. Algebra Comput.. 2015;25(1-2):259-292.Edit
A parametric model approach for quantification of short term QT variability uncorrelated with heart rate variability. In: Murray A, editor. {30th Annual Meeting on Computers in Cardiology}. Vol {30}. {IEEE}; 2003. {. {p. 165-168p. }.Edit
Hyperdecidable pseudovarieties and the calculation of semidirect products. Internat. J. Algebra Comput.. 1999;9:241-261.Edit
Quantification of the QT variability related to HRV: Robustness study facing automatic delineation and noise on the ECG. In: {31st Annual Scientific Meeting on Computers in Cardiology}. Vol {31}. {IEEE}; 2004. {. {p. 769-772p. }.Edit
Semidirectly closed pseudovarieties of locally trivial semigroups. Semigroup Forum. 1990;40:315-323.Edit