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Mirrors > Home > MPE Home > Th. List > fvmptf | Structured version Visualization version GIF version |
Description: Value of a function given by an ordered-pair class abstraction. This version of fvmptg 6189 uses bound-variable hypotheses instead of distinct variable conditions. (Contributed by NM, 8-Nov-2005.) (Revised by Mario Carneiro, 15-Oct-2016.) |
Ref | Expression |
---|---|
fvmptf.1 | ⊢ Ⅎ𝑥𝐴 |
fvmptf.2 | ⊢ Ⅎ𝑥𝐶 |
fvmptf.3 | ⊢ (𝑥 = 𝐴 → 𝐵 = 𝐶) |
fvmptf.4 | ⊢ 𝐹 = (𝑥 ∈ 𝐷 ↦ 𝐵) |
Ref | Expression |
---|---|
fvmptf | ⊢ ((𝐴 ∈ 𝐷 ∧ 𝐶 ∈ 𝑉) → (𝐹‘𝐴) = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elex 3185 | . . 3 ⊢ (𝐶 ∈ 𝑉 → 𝐶 ∈ V) | |
2 | fvmptf.1 | . . . 4 ⊢ Ⅎ𝑥𝐴 | |
3 | fvmptf.2 | . . . . . 6 ⊢ Ⅎ𝑥𝐶 | |
4 | 3 | nfel1 2765 | . . . . 5 ⊢ Ⅎ𝑥 𝐶 ∈ V |
5 | fvmptf.4 | . . . . . . . 8 ⊢ 𝐹 = (𝑥 ∈ 𝐷 ↦ 𝐵) | |
6 | nfmpt1 4675 | . . . . . . . 8 ⊢ Ⅎ𝑥(𝑥 ∈ 𝐷 ↦ 𝐵) | |
7 | 5, 6 | nfcxfr 2749 | . . . . . . 7 ⊢ Ⅎ𝑥𝐹 |
8 | 7, 2 | nffv 6110 | . . . . . 6 ⊢ Ⅎ𝑥(𝐹‘𝐴) |
9 | 8, 3 | nfeq 2762 | . . . . 5 ⊢ Ⅎ𝑥(𝐹‘𝐴) = 𝐶 |
10 | 4, 9 | nfim 1813 | . . . 4 ⊢ Ⅎ𝑥(𝐶 ∈ V → (𝐹‘𝐴) = 𝐶) |
11 | fvmptf.3 | . . . . . 6 ⊢ (𝑥 = 𝐴 → 𝐵 = 𝐶) | |
12 | 11 | eleq1d 2672 | . . . . 5 ⊢ (𝑥 = 𝐴 → (𝐵 ∈ V ↔ 𝐶 ∈ V)) |
13 | fveq2 6103 | . . . . . 6 ⊢ (𝑥 = 𝐴 → (𝐹‘𝑥) = (𝐹‘𝐴)) | |
14 | 13, 11 | eqeq12d 2625 | . . . . 5 ⊢ (𝑥 = 𝐴 → ((𝐹‘𝑥) = 𝐵 ↔ (𝐹‘𝐴) = 𝐶)) |
15 | 12, 14 | imbi12d 333 | . . . 4 ⊢ (𝑥 = 𝐴 → ((𝐵 ∈ V → (𝐹‘𝑥) = 𝐵) ↔ (𝐶 ∈ V → (𝐹‘𝐴) = 𝐶))) |
16 | 5 | fvmpt2 6200 | . . . . 5 ⊢ ((𝑥 ∈ 𝐷 ∧ 𝐵 ∈ V) → (𝐹‘𝑥) = 𝐵) |
17 | 16 | ex 449 | . . . 4 ⊢ (𝑥 ∈ 𝐷 → (𝐵 ∈ V → (𝐹‘𝑥) = 𝐵)) |
18 | 2, 10, 15, 17 | vtoclgaf 3244 | . . 3 ⊢ (𝐴 ∈ 𝐷 → (𝐶 ∈ V → (𝐹‘𝐴) = 𝐶)) |
19 | 1, 18 | syl5 33 | . 2 ⊢ (𝐴 ∈ 𝐷 → (𝐶 ∈ 𝑉 → (𝐹‘𝐴) = 𝐶)) |
20 | 19 | imp 444 | 1 ⊢ ((𝐴 ∈ 𝐷 ∧ 𝐶 ∈ 𝑉) → (𝐹‘𝐴) = 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∈ wcel 1977 Ⅎwnfc 2738 Vcvv 3173 ↦ cmpt 4643 ‘cfv 5804 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fv 5812 |
This theorem is referenced by: fvmptnf 6210 elfvmptrab1 6213 elovmpt3rab1 6791 rdgsucmptf 7411 frsucmpt 7420 fprodntriv 14511 prodss 14516 fprodefsum 14664 dvfsumabs 23590 dvfsumlem1 23593 dvfsumlem4 23596 dvfsum2 23601 dchrisumlem2 24979 dchrisumlem3 24980 ptrest 32578 hlhilset 36244 fsumsermpt 38646 mulc1cncfg 38656 expcnfg 38658 climsubmpt 38727 climeldmeqmpt 38735 climfveqmpt 38738 fnlimfvre 38741 fnlimfvre2 38744 stoweidlem23 38916 stoweidlem34 38927 stoweidlem36 38929 wallispilem5 38962 stirlinglem4 38970 stirlinglem11 38977 stirlinglem12 38978 stirlinglem13 38979 stirlinglem14 38980 sge0lempt 39303 sge0isummpt2 39325 meadjiun 39359 hoimbl2 39555 vonhoire 39563 |
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