Description: Lemma for isopo . (Contributed by Stefan O'Rear, 16-Nov-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | isopolem | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isof1o | |
|
2 | f1of | |
|
3 | ffvelcdm | |
|
4 | 3 | ex | |
5 | ffvelcdm | |
|
6 | 5 | ex | |
7 | ffvelcdm | |
|
8 | 7 | ex | |
9 | 4 6 8 | 3anim123d | |
10 | 1 2 9 | 3syl | |
11 | 10 | imp | |
12 | breq12 | |
|
13 | 12 | anidms | |
14 | 13 | notbid | |
15 | breq1 | |
|
16 | 15 | anbi1d | |
17 | breq1 | |
|
18 | 16 17 | imbi12d | |
19 | 14 18 | anbi12d | |
20 | breq2 | |
|
21 | breq1 | |
|
22 | 20 21 | anbi12d | |
23 | 22 | imbi1d | |
24 | 23 | anbi2d | |
25 | breq2 | |
|
26 | 25 | anbi2d | |
27 | breq2 | |
|
28 | 26 27 | imbi12d | |
29 | 28 | anbi2d | |
30 | 19 24 29 | rspc3v | |
31 | 11 30 | syl | |
32 | simpl | |
|
33 | simpr1 | |
|
34 | isorel | |
|
35 | 32 33 33 34 | syl12anc | |
36 | 35 | notbid | |
37 | simpr2 | |
|
38 | isorel | |
|
39 | 32 33 37 38 | syl12anc | |
40 | simpr3 | |
|
41 | isorel | |
|
42 | 32 37 40 41 | syl12anc | |
43 | 39 42 | anbi12d | |
44 | isorel | |
|
45 | 32 33 40 44 | syl12anc | |
46 | 43 45 | imbi12d | |
47 | 36 46 | anbi12d | |
48 | 31 47 | sylibrd | |
49 | 48 | ex | |
50 | 49 | com23 | |
51 | 50 | imp31 | |
52 | 51 | ralrimivvva | |
53 | 52 | ex | |
54 | df-po | |
|
55 | df-po | |
|
56 | 53 54 55 | 3imtr4g | |