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| Description: Image of the composition of two classes. (Contributed by Jason Orendorff, 12-Dec-2006.) |
| Ref | Expression |
|---|---|
| imaco |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rex 1650 |
. . 3
| |
| 2 | visset 1813 |
. . . 4
| |
| 3 | 2 | elima 3408 |
. . 3
|
| 4 | 2 | elima 3408 |
. . . . . 6
|
| 5 | visset 1813 |
. . . . . . . 8
| |
| 6 | 5, 2 | brco 3289 |
. . . . . . 7
|
| 7 | 6 | rexbii 1668 |
. . . . . 6
|
| 8 | 4, 7 | bitr 173 |
. . . . 5
|
| 9 | rexcom4 1824 |
. . . . 5
| |
| 10 | r19.41v 1763 |
. . . . . 6
| |
| 11 | 10 | exbii 1051 |
. . . . 5
|
| 12 | 8, 9, 11 | 3bitr 177 |
. . . 4
|
| 13 | visset 1813 |
. . . . . . 7
| |
| 14 | 13 | elima 3408 |
. . . . . 6
|
| 15 | 14 | anbi1i 481 |
. . . . 5
|
| 16 | 15 | exbii 1051 |
. . . 4
|
| 17 | 12, 16 | bitr4 176 |
. . 3
|
| 18 | 1, 3, 17 | 3bitr4r 184 |
. 2
|
| 19 | 18 | eqriv 1474 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cnco 7768 cnpco 7769 cmphmp 10521 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-sep 2703 ax-pow 2742 ax-pr 2779 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-rex 1650 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-br 2620 df-opab 2667 df-xp 3184 df-cnv 3186 df-co 3187 df-dm 3188 df-rn 3189 df-res 3190 df-ima 3191 |