Description: Length of the zero skipping sign word. (Contributed by Thierry Arnoux, 8-Oct-2018)
Ref | Expression | ||
---|---|---|---|
Hypotheses | signsv.p | |
|
signsv.w | |
||
signsv.t | |
||
signsv.v | |
||
Assertion | signstlen | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | signsv.p | |
|
2 | signsv.w | |
|
3 | signsv.t | |
|
4 | signsv.v | |
|
5 | ovex | |
|
6 | eqid | |
|
7 | 5 6 | fnmpti | |
8 | 1 2 3 4 | signstfv | |
9 | 8 | fneq1d | |
10 | 7 9 | mpbiri | |
11 | hashfn | |
|
12 | 10 11 | syl | |
13 | lencl | |
|
14 | hashfzo0 | |
|
15 | 13 14 | syl | |
16 | 12 15 | eqtrd | |