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Mirrors > Home > ILE Home > Th. List > f1ocnvfv1 | GIF version |
Description: The converse value of the value of a one-to-one onto function. (Contributed by NM, 20-May-2004.) |
Ref | Expression |
---|---|
f1ocnvfv1 | ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → (◡𝐹‘(𝐹‘𝐶)) = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1ococnv1 5460 | . . . 4 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → (◡𝐹 ∘ 𝐹) = ( I ↾ 𝐴)) | |
2 | 1 | fveq1d 5487 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → ((◡𝐹 ∘ 𝐹)‘𝐶) = (( I ↾ 𝐴)‘𝐶)) |
3 | 2 | adantr 274 | . 2 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → ((◡𝐹 ∘ 𝐹)‘𝐶) = (( I ↾ 𝐴)‘𝐶)) |
4 | f1of 5431 | . . 3 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
5 | fvco3 5556 | . . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐶 ∈ 𝐴) → ((◡𝐹 ∘ 𝐹)‘𝐶) = (◡𝐹‘(𝐹‘𝐶))) | |
6 | 4, 5 | sylan 281 | . 2 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → ((◡𝐹 ∘ 𝐹)‘𝐶) = (◡𝐹‘(𝐹‘𝐶))) |
7 | fvresi 5677 | . . 3 ⊢ (𝐶 ∈ 𝐴 → (( I ↾ 𝐴)‘𝐶) = 𝐶) | |
8 | 7 | adantl 275 | . 2 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → (( I ↾ 𝐴)‘𝐶) = 𝐶) |
9 | 3, 6, 8 | 3eqtr3d 2206 | 1 ⊢ ((𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐶 ∈ 𝐴) → (◡𝐹‘(𝐹‘𝐶)) = 𝐶) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1343 ∈ wcel 2136 I cid 4265 ◡ccnv 4602 ↾ cres 4605 ∘ ccom 4607 ⟶wf 5183 –1-1-onto→wf1o 5186 ‘cfv 5187 |
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 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4099 ax-pow 4152 ax-pr 4186 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2296 df-ral 2448 df-rex 2449 df-v 2727 df-sbc 2951 df-un 3119 df-in 3121 df-ss 3128 df-pw 3560 df-sn 3581 df-pr 3582 df-op 3584 df-uni 3789 df-br 3982 df-opab 4043 df-id 4270 df-xp 4609 df-rel 4610 df-cnv 4611 df-co 4612 df-dm 4613 df-rn 4614 df-res 4615 df-ima 4616 df-iota 5152 df-fun 5189 df-fn 5190 df-f 5191 df-f1 5192 df-fo 5193 df-f1o 5194 df-fv 5195 |
This theorem is referenced by: f1ocnvfv 5746 caseinl 7052 caseinr 7053 ctssdccl 7072 cc3 7205 iseqf1olemab 10420 cnrecnv 10848 fprodssdc 11527 ennnfonelemhf1o 12342 ennnfonelemex 12343 ennnfonelemrn 12348 ctinfomlemom 12356 ssnnctlemct 12375 isomninnlem 13869 iswomninnlem 13888 ismkvnnlem 13891 |
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