The elements $x$ of the set $V$, which are equivalent to a given element $a\in V$, i.e. the set $[a]:=\{x\in V, x\sim a\}$ is called the equivalence class of \(a\).
Axioms: 1
Branches: 2
Chapters: 3
Definitions: 4 5 6 7 8
Proofs: 9 10 11 12
Propositions: 13 14
Solutions: 15