(1) | $X = \emptyset$ |
(2) | $Y = \emptyset$ |
▼ | Set of symbols |
▼ | Alphabet |
▼ | Deduction system |
▼ | Theory |
▼ | Zermelo-Fraenkel set theory |
▼ | Set |
▼ | Binary cartesian set product |
▼ | Binary relation |
▼ | Map |
▼ | Empty map |
(1) | $X = \emptyset$ |
(2) | $Y = \emptyset$ |