Step |
Hyp |
Ref |
Expression |
1 |
|
funres |
|
2 |
1
|
adantl |
|
3 |
2
|
adantr |
|
4 |
|
funsng |
|
5 |
4
|
adantl |
|
6 |
|
dmres |
|
7 |
6
|
ineq1i |
|
8 |
|
in32 |
|
9 |
|
incom |
|
10 |
|
disjdif |
|
11 |
9 10
|
eqtri |
|
12 |
11
|
ineq1i |
|
13 |
|
0in |
|
14 |
8 12 13
|
3eqtri |
|
15 |
7 14
|
eqtri |
|
16 |
15
|
a1i |
|
17 |
|
funun |
|
18 |
3 5 16 17
|
syl21anc |
|
19 |
|
opex |
|
20 |
19
|
a1i |
|
21 |
|
setsvalg |
|
22 |
20 21
|
sylan2 |
|
23 |
22
|
funeqd |
|
24 |
23
|
adantr |
|
25 |
18 24
|
mpbird |
|