Abstract
Throughout the history of mathematics, the notion of an equivalence relation has played a fundamental role. It dates back at least to the time when the natural numbers first were introduced: a non-negative integer may be thought of as a representative of the equivalence class of sets with the same cardinality. To express such a simple and “obvious” fact with equivalence relations may seem unnecessarily cumbersome. Nothing is further from the truth. Equivalence relations play a decisive role as building elements in every area of mathematics. For instance, algebra is firmly founded on equivalence relations: groups theory, rings theory, modules and fields would basically be impossible to define and use without equivalence relations.
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© 2001 Springer-Verlag Italia
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Britz, T., Mainetti, M., Pezzoli, L. (2001). Some operations on the family of equivalence relations. In: Crapo, H., Senato, D. (eds) Algebraic Combinatorics and Computer Science. Springer, Milano. https://doi.org/10.1007/978-88-470-2107-5_18
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DOI: https://doi.org/10.1007/978-88-470-2107-5_18
Publisher Name: Springer, Milano
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