Idempotent Topological Groupoids with Non-Empty Center.
A Note on Means in Peano Continua.
A Simple Proof of the Künneth Theorem for Alexander Cohomology.
Report of Meeting: Second Florida Symposium on Automata and Semigroups April 13-16, 1971
Medial Topological Groupoids. (Short Communication).
On the existence of a mean on certain continua
Standard threads and distributivity.
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