| Mathbox for Stefan O'Rear |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > mapfzcons2 | Structured version Visualization version GIF version | ||
| Description: Recover added element from an extended mapping. (Contributed by Stefan O'Rear, 10-Oct-2014.) (Revised by Stefan O'Rear, 5-May-2015.) |
| Ref | Expression |
|---|---|
| mapfzcons.1 | ⊢ 𝑀 = (𝑁 + 1) |
| Ref | Expression |
|---|---|
| mapfzcons2 | ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → ((𝐴 ∪ {〈𝑀, 𝐶〉})‘𝑀) = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mapfzcons.1 | . . . 4 ⊢ 𝑀 = (𝑁 + 1) | |
| 2 | ovex 7394 | . . . 4 ⊢ (𝑁 + 1) ∈ V | |
| 3 | 1, 2 | eqeltri 2833 | . . 3 ⊢ 𝑀 ∈ V |
| 4 | 3 | a1i 11 | . 2 ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → 𝑀 ∈ V) |
| 5 | elex 3451 | . . 3 ⊢ (𝐶 ∈ 𝐵 → 𝐶 ∈ V) | |
| 6 | 5 | adantl 481 | . 2 ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → 𝐶 ∈ V) |
| 7 | elmapi 8790 | . . . . . . 7 ⊢ (𝐴 ∈ (𝐵 ↑m (1...𝑁)) → 𝐴:(1...𝑁)⟶𝐵) | |
| 8 | 7 | fdmd 6673 | . . . . . 6 ⊢ (𝐴 ∈ (𝐵 ↑m (1...𝑁)) → dom 𝐴 = (1...𝑁)) |
| 9 | 8 | adantr 480 | . . . . 5 ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → dom 𝐴 = (1...𝑁)) |
| 10 | 9 | ineq1d 4160 | . . . 4 ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → (dom 𝐴 ∩ {𝑀}) = ((1...𝑁) ∩ {𝑀})) |
| 11 | 1 | sneqi 4579 | . . . . . 6 ⊢ {𝑀} = {(𝑁 + 1)} |
| 12 | 11 | ineq2i 4158 | . . . . 5 ⊢ ((1...𝑁) ∩ {𝑀}) = ((1...𝑁) ∩ {(𝑁 + 1)}) |
| 13 | fzp1disj 13531 | . . . . 5 ⊢ ((1...𝑁) ∩ {(𝑁 + 1)}) = ∅ | |
| 14 | 12, 13 | eqtri 2760 | . . . 4 ⊢ ((1...𝑁) ∩ {𝑀}) = ∅ |
| 15 | 10, 14 | eqtrdi 2788 | . . 3 ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → (dom 𝐴 ∩ {𝑀}) = ∅) |
| 16 | disjsn 4656 | . . 3 ⊢ ((dom 𝐴 ∩ {𝑀}) = ∅ ↔ ¬ 𝑀 ∈ dom 𝐴) | |
| 17 | 15, 16 | sylib 218 | . 2 ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → ¬ 𝑀 ∈ dom 𝐴) |
| 18 | fsnunfv 7136 | . 2 ⊢ ((𝑀 ∈ V ∧ 𝐶 ∈ V ∧ ¬ 𝑀 ∈ dom 𝐴) → ((𝐴 ∪ {〈𝑀, 𝐶〉})‘𝑀) = 𝐶) | |
| 19 | 4, 6, 17, 18 | syl3anc 1374 | 1 ⊢ ((𝐴 ∈ (𝐵 ↑m (1...𝑁)) ∧ 𝐶 ∈ 𝐵) → ((𝐴 ∪ {〈𝑀, 𝐶〉})‘𝑀) = 𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 Vcvv 3430 ∪ cun 3888 ∩ cin 3889 ∅c0 4274 {csn 4568 〈cop 4574 dom cdm 5625 ‘cfv 6493 (class class class)co 7361 ↑m cmap 8767 1c1 11033 + caddc 11035 ...cfz 13455 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5520 df-po 5533 df-so 5534 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-1st 7936 df-2nd 7937 df-er 8637 df-map 8769 df-en 8888 df-dom 8889 df-sdom 8890 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-z 12519 df-uz 12783 df-fz 13456 |
| This theorem is referenced by: rexrabdioph 43243 |
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