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Mirrors > Home > NFE Home > Th. List > f1ococnv1 | GIF version |
Description: The composition of a one-to-one onto function's converse and itself equals the identity relation restricted to the function's domain. (Contributed by set.mm contributors, 13-Dec-2003.) |
Ref | Expression |
---|---|
f1ococnv1 | ⊢ (F:A–1-1-onto→B → (◡F ∘ F) = ( I ↾ A)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnvcnv 5063 | . . 3 ⊢ ◡◡F = F | |
2 | 1 | coeq2i 4878 | . 2 ⊢ (◡F ∘ ◡◡F) = (◡F ∘ F) |
3 | f1ocnv 5300 | . . 3 ⊢ (F:A–1-1-onto→B → ◡F:B–1-1-onto→A) | |
4 | f1ococnv2 5310 | . . 3 ⊢ (◡F:B–1-1-onto→A → (◡F ∘ ◡◡F) = ( I ↾ A)) | |
5 | 3, 4 | syl 15 | . 2 ⊢ (F:A–1-1-onto→B → (◡F ∘ ◡◡F) = ( I ↾ A)) |
6 | 2, 5 | syl5eqr 2399 | 1 ⊢ (F:A–1-1-onto→B → (◡F ∘ F) = ( I ↾ A)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1642 ∘ ccom 4722 I cid 4764 ◡ccnv 4772 ↾ cres 4775 –1-1-onto→wf1o 4781 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-13 1712 ax-14 1714 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 ax-nin 4079 ax-xp 4080 ax-cnv 4081 ax-1c 4082 ax-sset 4083 ax-si 4084 ax-ins2 4085 ax-ins3 4086 ax-typlower 4087 ax-sn 4088 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-3or 935 df-3an 936 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-eu 2208 df-mo 2209 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-ne 2519 df-ral 2620 df-rex 2621 df-reu 2622 df-rmo 2623 df-rab 2624 df-v 2862 df-sbc 3048 df-nin 3212 df-compl 3213 df-in 3214 df-un 3215 df-dif 3216 df-symdif 3217 df-ss 3260 df-pss 3262 df-nul 3552 df-if 3664 df-pw 3725 df-sn 3742 df-pr 3743 df-uni 3893 df-int 3928 df-opk 4059 df-1c 4137 df-pw1 4138 df-uni1 4139 df-xpk 4186 df-cnvk 4187 df-ins2k 4188 df-ins3k 4189 df-imak 4190 df-cok 4191 df-p6 4192 df-sik 4193 df-ssetk 4194 df-imagek 4195 df-idk 4196 df-iota 4340 df-0c 4378 df-addc 4379 df-nnc 4380 df-fin 4381 df-lefin 4441 df-ltfin 4442 df-ncfin 4443 df-tfin 4444 df-evenfin 4445 df-oddfin 4446 df-sfin 4447 df-spfin 4448 df-phi 4566 df-op 4567 df-proj1 4568 df-proj2 4569 df-opab 4624 df-br 4641 df-co 4727 df-ima 4728 df-id 4768 df-xp 4785 df-cnv 4786 df-rn 4787 df-dm 4788 df-res 4789 df-fun 4790 df-fn 4791 df-f 4792 df-f1 4793 df-fo 4794 df-f1o 4795 |
This theorem is referenced by: f1cocnv1 5313 f1ocnvfv1 5477 enmap2lem3 6066 enmap1lem3 6072 |
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