Gentlemen: I was wondering about equivalence, reflexive, transitive and symmetric relations, and I realized the importance of the transitive and symmetric ones, but it was not so intuitive for me to make explicit the reflexive relation... can someone explain why it is necessary to make explicit this relation when considering equivalence?(adsbygoogle = window.adsbygoogle || []).push({});

Sorry for my poor english and thanks in advance.

**Physics Forums - The Fusion of Science and Community**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# The necessity of a reflexive relation

Loading...

Similar Threads - necessity reflexive relation | Date |
---|---|

Sufficiency and Necessity in Language and Math | Jun 15, 2015 |

Necessity Condition in Implication ? | Aug 27, 2014 |

Question on reflexivity, symmetry, and transitivity (Relation on X (Attempt inside)? | Nov 1, 2011 |

A symmetric, transitive relation on a set that is not reflexive | Sep 5, 2010 |

Reflexive = transistive relation? | May 9, 2010 |

**Physics Forums - The Fusion of Science and Community**