Extending tensor products to structures of closed categories
Aleš Pultr (1972)
Commentationes Mathematicae Universitatis Carolinae
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Aleš Pultr (1972)
Commentationes Mathematicae Universitatis Carolinae
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Wilfried Imrich, Aleš Pultr (1991)
Commentationes Mathematicae Universitatis Carolinae
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In the category of symmetric graphs there are exactly five closed tensor products. If we omit the requirement of units, we obtain twelve more.