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| Description: Move class substitution in and out of the image of a function. (Contributed by FL, 15-Dec-2006.) |
| Ref | Expression |
|---|---|
| csbima12g |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-17 973 |
. . . 4
| |
| 2 | ax-17 973 |
. . . . 5
| |
| 3 | 2 | hbcsb1g 2027 |
. . . 4
|
| 4 | 2 | hbcsb1g 2027 |
. . . 4
|
| 5 | 1, 3, 4 | hbimad 3418 |
. . 3
|
| 6 | a9e 1127 |
. . . . . 6
| |
| 7 | visset 1816 |
. . . . . . . . 9
| |
| 8 | ax-17 973 |
. . . . . . . . 9
| |
| 9 | 7, 8 | hbcsb1 2028 |
. . . . . . . 8
|
| 10 | 7, 8 | hbcsb1 2028 |
. . . . . . . . 9
|
| 11 | 7, 8 | hbcsb1 2028 |
. . . . . . . . 9
|
| 12 | 10, 11 | hbima 3417 |
. . . . . . . 8
|
| 13 | 9, 12 | hbeq 1568 |
. . . . . . 7
|
| 14 | csbeq1a 2009 |
. . . . . . . . 9
| |
| 15 | 14 | imaeq1d 3409 |
. . . . . . . 8
|
| 16 | csbeq1a 2009 |
. . . . . . . 8
| |
| 17 | csbeq1a 2009 |
. . . . . . . . 9
| |
| 18 | 17 | imaeq2d 3410 |
. . . . . . . 8
|
| 19 | 15, 16, 18 | 3eqtr3d 1518 |
. . . . . . 7
|
| 20 | 13, 19 | 19.23ai 1066 |
. . . . . 6
|
| 21 | 6, 20 | ax-mp 7 |
. . . . 5
|
| 22 | 21 | a1i 8 |
. . . 4
|
| 23 | csbeq1a 2009 |
. . . . 5
| |
| 24 | 23 | imaeq1d 3409 |
. . . 4
|
| 25 | csbeq1a 2009 |
. . . . 5
| |
| 26 | 25 | imaeq2d 3410 |
. . . 4
|
| 27 | 22, 24, 26 | 3eqtrd 1514 |
. . 3
|
| 28 | 5, 27 | csbiegf 2034 |
. 2
|
| 29 | csbcog 2010 |
. 2
| |
| 30 | csbcog 2010 |
. . . 4
| |
| 31 | 30 | imaeq1d 3409 |
. . 3
|
| 32 | csbcog 2010 |
. . . 4
| |
| 33 | 32 | imaeq2d 3410 |
. . 3
|
| 34 | 31, 33 | eqtrd 1510 |
. 2
|
| 35 | 28, 29, 34 | 3eqtr3d 1518 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-9 967 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-sep 2708 ax-pow 2748 ax-pr 2785 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 779 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-rex 1653 df-v 1815 df-sbc 1945 df-csb 2005 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-pw 2406 df-sn 2416 df-pr 2417 df-op 2420 df-br 2625 df-opab 2672 df-xp 3190 df-cnv 3192 df-dm 3194 df-rn 3195 df-res 3196 df-ima 3197 |