Definition:Null Relation/Also known as
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Null Relation: Also known as
The null relation is also sometimes referred to as a trivial relation by some authors, but to save confusion it is better to use that term specifically to mean this one.
Some sources prefer to call it the empty relation.
Sources
- 1960: Paul R. Halmos: Naive Set Theory ... (previous) ... (next): $\S 7$: Relations
- 1977: Gary Chartrand: Introductory Graph Theory ... (previous) ... (next): Appendix $\text{A}.2$: Cartesian Products and Relations: Problem Set $\text{A}.2$: $11$