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Mirrors > Home > MPE Home > Th. List > resin | Unicode version |
Description: The restriction of a one-to-one onto function to an intersection maps onto the intersection of the images. (Contributed by Paul Chapman, 11-Apr-2009.) |
Ref | Expression |
---|---|
resin |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | resdif 5841 | . . . 4 | |
2 | f1ofo 5828 | . . . 4 | |
3 | 1, 2 | syl 16 | . . 3 |
4 | resdif 5841 | . . 3 | |
5 | 3, 4 | syld3an3 1273 | . 2 |
6 | dfin4 3737 | . . . 4 | |
7 | f1oeq3 5814 | . . . 4 | |
8 | 6, 7 | ax-mp 5 | . . 3 |
9 | dfin4 3737 | . . . 4 | |
10 | f1oeq2 5813 | . . . 4 | |
11 | 9, 10 | ax-mp 5 | . . 3 |
12 | 9 | reseq2i 5275 | . . . 4 |
13 | f1oeq1 5812 | . . . 4 | |
14 | 12, 13 | ax-mp 5 | . . 3 |
15 | 8, 11, 14 | 3bitrri 272 | . 2 |
16 | 5, 15 | sylib 196 | 1 |
Colors of variables: wff setvar class |
Syntax hints: -> wi 4 <-> wb 184
/\ w3a 973 = wceq 1395 \ cdif 3472
i^i cin 3474 `' ccnv 5003 |` cres 5006
Fun wfun 5587
-onto-> wfo 5591
-1-1-onto-> wf1o 5592 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1618 ax-4 1631 ax-5 1704 ax-6 1747 ax-7 1790 ax-9 1822 ax-10 1837 ax-11 1842 ax-12 1854 ax-13 1999 ax-ext 2435 ax-sep 4573 ax-nul 4581 ax-pr 4691 |
This theorem depends on definitions: df-bi 185 df-or 370 df-an 371 df-3an 975 df-tru 1398 df-ex 1613 df-nf 1617 df-sb 1740 df-eu 2286 df-mo 2287 df-clab 2443 df-cleq 2449 df-clel 2452 df-nfc 2607 df-ne 2654 df-ral 2812 df-rex 2813 df-rab 2816 df-v 3111 df-dif 3478 df-un 3480 df-in 3482 df-ss 3489 df-nul 3785 df-if 3942 df-sn 4030 df-pr 4032 df-op 4036 df-br 4453 df-opab 4511 df-id 4800 df-xp 5010 df-rel 5011 df-cnv 5012 df-co 5013 df-dm 5014 df-rn 5015 df-res 5016 df-ima 5017 df-fun 5595 df-fn 5596 df-f 5597 df-f1 5598 df-fo 5599 df-f1o 5600 |
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