Step |
Hyp |
Ref |
Expression |
1 |
|
issect.b |
|
2 |
|
issect.h |
|
3 |
|
issect.o |
|
4 |
|
issect.i |
|
5 |
|
issect.s |
|
6 |
|
issect.c |
|
7 |
|
issect.x |
|
8 |
|
issect.y |
|
9 |
1 2 3 4 5 6 7 7
|
sectffval |
|
10 |
|
simprl |
|
11 |
|
simprr |
|
12 |
10 11
|
oveq12d |
|
13 |
12
|
eleq2d |
|
14 |
11 10
|
oveq12d |
|
15 |
14
|
eleq2d |
|
16 |
13 15
|
anbi12d |
|
17 |
10 11
|
opeq12d |
|
18 |
17 10
|
oveq12d |
|
19 |
18
|
oveqd |
|
20 |
10
|
fveq2d |
|
21 |
19 20
|
eqeq12d |
|
22 |
16 21
|
anbi12d |
|
23 |
22
|
opabbidv |
|
24 |
|
ovex |
|
25 |
|
ovex |
|
26 |
24 25
|
xpex |
|
27 |
|
opabssxp |
|
28 |
26 27
|
ssexi |
|
29 |
28
|
a1i |
|
30 |
9 23 7 8 29
|
ovmpod |
|