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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 3476 |
. 2
| |
| 2 | rel0 3267 |
. 2
| |
| 3 | noel 2280 |
. . . . . . 7
| |
| 4 | df-br 2615 |
. . . . . . 7
| |
| 5 | 3, 4 | mtbir 192 |
. . . . . 6
|
| 6 | 5 | intnanr 691 |
. . . . 5
|
| 7 | 6 | nex 1099 |
. . . 4
|
| 8 | visset 1809 |
. . . . 5
| |
| 9 | visset 1809 |
. . . . 5
| |
| 10 | 8, 9 | opelco 3283 |
. . . 4
|
| 11 | 7, 10 | mtbir 192 |
. . 3
|
| 12 | noel 2280 |
. . 3
| |
| 13 | 11, 12 | 2false 718 |
. 2
|
| 14 | 1, 2, 13 | eqrelriv 3246 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: co01 3501 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-sep 2698 ax-pow 2737 ax-pr 2774 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-br 2615 df-opab 2662 df-xp 3179 df-rel 3180 df-co 3182 |