Geodesic
Reflexive Homomorphic Relations
Canadian mathematical bulletin, Tome 3 (1960) no. 2, pp. 131-132

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It is well known that a symmetric and transitive relation on a set is reflexive wherever it is defined. In this note we show that a converse is true for homomorphic relations in certain classes of algebras.Consider a class of similar algebras which contains the sub-algebras and quotient algebras of each of its members. Assume also that the direct product A x B of each pair A, B in is also an algebra belonging to . The algebras of , being similar, have the same set of operations. We observe that other operations, called compound operations, may be obtained by composition from the assigned operations. 
Findlay, G. D. Reflexive Homomorphic Relations. Canadian mathematical bulletin, Tome 3 (1960) no. 2, pp. 131-132. doi: 10.4153/CMB-1960-015-x
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