Description: A relationship that can be used for computation of rank. (Contributed by NM, 16-Sep-2006)
Ref | Expression | ||
---|---|---|---|
Hypothesis | rankr1b.1 | |
|
Assertion | rankc1 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rankr1b.1 | |
|
2 | 1 | rankuniss | |
3 | 2 | biantru | |
4 | iunss | |
|
5 | 1 | rankval4 | |
6 | 5 | sseq1i | |
7 | rankon | |
|
8 | rankon | |
|
9 | 7 8 | onsucssi | |
10 | 9 | ralbii | |
11 | 4 6 10 | 3bitr4ri | |
12 | eqss | |
|
13 | 3 11 12 | 3bitr4i | |