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| Mirrors > Home > MPE Home > Th. List > ex-res | Structured version Visualization version GIF version | ||
| Description: Example for df-res 5678. Example by David A. Wheeler. (Contributed by Mario Carneiro, 7-May-2015.) |
| Ref | Expression |
|---|---|
| ex-res | ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → (𝐹 ↾ 𝐵) = {〈2, 6〉}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpl 488 | . . . . 5 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → 𝐹 = {〈2, 6〉, 〈3, 9〉}) | |
| 2 | df-pr 4597 | . . . . 5 ⊢ {〈2, 6〉, 〈3, 9〉} = ({〈2, 6〉} ∪ {〈3, 9〉}) | |
| 3 | 1, 2 | eqtrdi 2817 | . . . 4 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → 𝐹 = ({〈2, 6〉} ∪ {〈3, 9〉})) |
| 4 | 3 | reseq1d 5982 | . . 3 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → (𝐹 ↾ 𝐵) = (({〈2, 6〉} ∪ {〈3, 9〉}) ↾ 𝐵)) |
| 5 | resundir 5998 | . . 3 ⊢ (({〈2, 6〉} ∪ {〈3, 9〉}) ↾ 𝐵) = (({〈2, 6〉} ↾ 𝐵) ∪ ({〈3, 9〉} ↾ 𝐵)) | |
| 6 | 4, 5 | eqtrdi 2817 | . 2 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → (𝐹 ↾ 𝐵) = (({〈2, 6〉} ↾ 𝐵) ∪ ({〈3, 9〉} ↾ 𝐵))) |
| 7 | 2re 12333 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
| 8 | 7 | elexi 3480 | . . . . . 6 ⊢ 2 ∈ V |
| 9 | 6re 12349 | . . . . . . 7 ⊢ 6 ∈ ℝ | |
| 10 | 9 | elexi 3480 | . . . . . 6 ⊢ 6 ∈ V |
| 11 | 8, 10 | relsnop 5797 | . . . . 5 ⊢ Rel {〈2, 6〉} |
| 12 | dmsnopss 6220 | . . . . . 6 ⊢ dom {〈2, 6〉} ⊆ {2} | |
| 13 | snsspr2 4786 | . . . . . . 7 ⊢ {2} ⊆ {1, 2} | |
| 14 | simpr 490 | . . . . . . 7 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → 𝐵 = {1, 2}) | |
| 15 | 13, 14 | sseqtrrid 3983 | . . . . . 6 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → {2} ⊆ 𝐵) |
| 16 | 12, 15 | sstrid 3951 | . . . . 5 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → dom {〈2, 6〉} ⊆ 𝐵) |
| 17 | relssres 6026 | . . . . 5 ⊢ ((Rel {〈2, 6〉} ∧ dom {〈2, 6〉} ⊆ 𝐵) → ({〈2, 6〉} ↾ 𝐵) = {〈2, 6〉}) | |
| 18 | 11, 16, 17 | sylancr 599 | . . . 4 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → ({〈2, 6〉} ↾ 𝐵) = {〈2, 6〉}) |
| 19 | 1re 11226 | . . . . . . . 8 ⊢ 1 ∈ ℝ | |
| 20 | 1lt3 12434 | . . . . . . . 8 ⊢ 1 < 3 | |
| 21 | 19, 20 | gtneii 11340 | . . . . . . 7 ⊢ 3 ≠ 1 |
| 22 | 2lt3 12432 | . . . . . . . 8 ⊢ 2 < 3 | |
| 23 | 7, 22 | gtneii 11340 | . . . . . . 7 ⊢ 3 ≠ 2 |
| 24 | 21, 23 | nelpri 4626 | . . . . . 6 ⊢ ¬ 3 ∈ {1, 2} |
| 25 | 14 | eleq2d 2852 | . . . . . 6 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → (3 ∈ 𝐵 ↔ 3 ∈ {1, 2})) |
| 26 | 24, 25 | mtbiri 330 | . . . . 5 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → ¬ 3 ∈ 𝐵) |
| 27 | ressnop0 7157 | . . . . 5 ⊢ (¬ 3 ∈ 𝐵 → ({〈3, 9〉} ↾ 𝐵) = ∅) | |
| 28 | 26, 27 | syl 18 | . . . 4 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → ({〈3, 9〉} ↾ 𝐵) = ∅) |
| 29 | 18, 28 | uneq12d 4126 | . . 3 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → (({〈2, 6〉} ↾ 𝐵) ∪ ({〈3, 9〉} ↾ 𝐵)) = ({〈2, 6〉} ∪ ∅)) |
| 30 | un0 4354 | . . 3 ⊢ ({〈2, 6〉} ∪ ∅) = {〈2, 6〉} | |
| 31 | 29, 30 | eqtrdi 2817 | . 2 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → (({〈2, 6〉} ↾ 𝐵) ∪ ({〈3, 9〉} ↾ 𝐵)) = {〈2, 6〉}) |
| 32 | 6, 31 | eqtrd 2801 | 1 ⊢ ((𝐹 = {〈2, 6〉, 〈3, 9〉} ∧ 𝐵 = {1, 2}) → (𝐹 ↾ 𝐵) = {〈2, 6〉}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 ∪ cun 3906 ⊆ wss 3908 ∅c0 4289 {csn 4594 {cpr 4596 〈cop 4600 dom cdm 5666 ↾ cres 5668 Rel wrel 5671 ℝcr 11117 1c1 11119 2c2 12313 3c3 12314 6c6 12317 9c9 12320 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-po 5574 df-so 5575 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-2 12321 df-3 12322 df-4 12323 df-5 12324 df-6 12325 |
| This theorem is used by: ex-ima 30830 |
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