Description: subf without ax-mulcom . (Contributed by SN, 5-May-2024)
Ref | Expression | ||
---|---|---|---|
Assertion | sn-subf | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subval | |
|
2 | sn-subcl | |
|
3 | 1 2 | eqeltrrd | |
4 | 3 | rgen2 | |
5 | df-sub | |
|
6 | 5 | fmpo | |
7 | 4 6 | mpbi | |