New posts in Relations

All sequences are sets?

Reflexive, symmetric, transitive, and antisymmetric

How many injective functions from $\{5,6,7,8,9\}$ to itself map $5$ and $6$ to another number?

What does it mean when I say that addition/multiplication for an equivalence relation is well defined?

What binary relation is neither symmetric, nor asymmetric nor antisymmetric?

First-order sentence involving only a symmetric binary relation with only infinite models

Understanding Equivalence Classes?

$ (a,b), (c,d) \in \mathbb{R} \times \mathbb{R}\ $ let us define a relation by $(a,b) \sim (c,d)$ if and only if $\ a + 2d = c+2b$

How should I be avoiding this mistake? (To avoid missing solutions)

Existence of the transitive closure for sets