| ▼ | Set of symbols |
| ▼ | Alphabet |
| ▼ | Deduction system |
| ▼ | Theory |
| ▼ | Zermelo-Fraenkel set theory |
| ▼ | Set |
| ▼ | Binary cartesian set product |
| ▼ | Binary relation |
| ▼ | Relation |
| ▼ | N-ary relation |
| ▶ | R4309: Number of N-ary relations on a finite cartesian product |
| ▶ | R4310: Number of N-ary relations on a finite set |