Description: The empty set is a finitely supported function. (Contributed by AV, 19-Jul-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | 0fsupp |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | supp0 | ||
2 | 0fin | ||
3 | 1 2 | eqeltrdi | |
4 | fun0 | ||
5 | 0ex | ||
6 | funisfsupp | ||
7 | 4 5 6 | mp3an12 | |
8 | 3 7 | mpbird |