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| Mirrors > Home > ILE Home > Th. List > relcoi2 | Unicode version | ||
| Description: Composition with the identity relation restricted to a relation's field. (Contributed by FL, 2-May-2011.) |
| Ref | Expression |
|---|---|
| relcoi2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmrnssfld 4994 |
. . . 4
| |
| 2 | unss 3380 |
. . . . 5
| |
| 3 | simpr 110 |
. . . . 5
| |
| 4 | 2, 3 | sylbir 135 |
. . . 4
|
| 5 | 1, 4 | ax-mp 5 |
. . 3
|
| 6 | cores 5239 |
. . 3
| |
| 7 | 5, 6 | mp1i 10 |
. 2
|
| 8 | coi2 5252 |
. 2
| |
| 9 | 7, 8 | eqtrd 2263 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2204 ax-ext 2212 ax-sep 4206 ax-pow 4263 ax-pr 4298 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ral 2514 df-rex 2515 df-v 2803 df-un 3203 df-in 3205 df-ss 3212 df-pw 3653 df-sn 3674 df-pr 3675 df-op 3677 df-uni 3893 df-br 4088 df-opab 4150 df-id 4389 df-xp 4730 df-rel 4731 df-cnv 4732 df-co 4733 df-dm 4734 df-rn 4735 df-res 4736 |
| This theorem is referenced by: (None) |
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