Broere, IzakHeidema, JohannesPretorius, Lou2018-02-262018Izak Broere, Johannes Heidema & Lou Pretorius (2018): Graph congruences and what they connote, Quaestiones Mathematicae, 41:8, 1045-1059, DOI:10.2989/16073606.2017.1419388.1607-3606 (print)1727-933X (online)10.2989/16073606.2017.1419388http://hdl.handle.net/2263/64077Please read abstract in the article.en© 2018 NISC (Pty) Ltd. This is an electronic version of an article published in Quaestiones Mathematicae, vol. 41, no. 8, pp. 1045-1059, 2018. doi : 10.2989/16073606.2017.1419388. Quaestiones Mathematicae is available online at : http://www.tandfonline.comloi/tqma20.GraphCongruenceComplete algebraic latticeUniversal vertexLoopy graphSubdirect productIsomorphism theoremQuotient graphHomomorphismPostprint Article