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Mirrors > Home > ILE Home > Th. List > fresin | Unicode version |
Description: An identity for the mapping relationship under restriction. (Contributed by Scott Fenton, 4-Sep-2011.) (Proof shortened by Mario Carneiro, 26-May-2016.) |
Ref | Expression |
---|---|
fresin |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | inss1 3291 | . . 3 | |
2 | fssres 5293 | . . 3 | |
3 | 1, 2 | mpan2 421 | . 2 |
4 | resres 4826 | . . . 4 | |
5 | ffn 5267 | . . . . . 6 | |
6 | fnresdm 5227 | . . . . . 6 | |
7 | 5, 6 | syl 14 | . . . . 5 |
8 | 7 | reseq1d 4813 | . . . 4 |
9 | 4, 8 | syl5eqr 2184 | . . 3 |
10 | 9 | feq1d 5254 | . 2 |
11 | 3, 10 | mpbid 146 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 cin 3065 wss 3066 cres 4536 wfn 5113 wf 5114 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-br 3925 df-opab 3985 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-rn 4545 df-res 4546 df-fun 5120 df-fn 5121 df-f 5122 |
This theorem is referenced by: limcresi 12793 |
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