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| Description: Composition with the empty set. Theorem 20 of [Suppes] p. 63. |
| Ref | Expression |
|---|---|
| co02 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relco 3470 |
. 2
| |
| 2 | rel0 3262 |
. 2
| |
| 3 | noel 2274 |
. . . . . . 7
| |
| 4 | df-br 2610 |
. . . . . . 7
| |
| 5 | 3, 4 | mtbir 192 |
. . . . . 6
|
| 6 | 5 | intnanr 690 |
. . . . 5
|
| 7 | 6 | nex 1097 |
. . . 4
|
| 8 | visset 1804 |
. . . . 5
| |
| 9 | visset 1804 |
. . . . 5
| |
| 10 | 8, 9 | opelco 3277 |
. . . 4
|
| 11 | 7, 10 | mtbir 192 |
. . 3
|
| 12 | noel 2274 |
. . 3
| |
| 13 | 11, 12 | 2false 717 |
. 2
|
| 14 | 1, 2, 13 | eqrelriv 3241 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: co01 3495 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 ax-pow 2732 ax-pr 2769 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-op 2406 df-br 2610 df-opab 2657 df-xp 3174 df-rel 3175 df-co 3177 |