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Mirrors > Home > MPE Home > Th. List > xpscfv | Structured version Visualization version GIF version |
Description: The value of the pair function at an element of 2𝑜. (Contributed by Mario Carneiro, 14-Aug-2015.) |
Ref | Expression |
---|---|
xpscfv | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 2𝑜) → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elpri 4145 | . . . 4 ⊢ (𝐶 ∈ {∅, 1𝑜} → (𝐶 = ∅ ∨ 𝐶 = 1𝑜)) | |
2 | df2o3 7460 | . . . 4 ⊢ 2𝑜 = {∅, 1𝑜} | |
3 | 1, 2 | eleq2s 2706 | . . 3 ⊢ (𝐶 ∈ 2𝑜 → (𝐶 = ∅ ∨ 𝐶 = 1𝑜)) |
4 | xpsc0 16043 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → (◡({𝐴} +𝑐 {𝐵})‘∅) = 𝐴) | |
5 | 4 | adantr 480 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (◡({𝐴} +𝑐 {𝐵})‘∅) = 𝐴) |
6 | fveq2 6103 | . . . . . 6 ⊢ (𝐶 = ∅ → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = (◡({𝐴} +𝑐 {𝐵})‘∅)) | |
7 | iftrue 4042 | . . . . . 6 ⊢ (𝐶 = ∅ → if(𝐶 = ∅, 𝐴, 𝐵) = 𝐴) | |
8 | 6, 7 | eqeq12d 2625 | . . . . 5 ⊢ (𝐶 = ∅ → ((◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵) ↔ (◡({𝐴} +𝑐 {𝐵})‘∅) = 𝐴)) |
9 | 5, 8 | syl5ibrcom 236 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 = ∅ → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
10 | xpsc1 16044 | . . . . . 6 ⊢ (𝐵 ∈ 𝑊 → (◡({𝐴} +𝑐 {𝐵})‘1𝑜) = 𝐵) | |
11 | 10 | adantl 481 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (◡({𝐴} +𝑐 {𝐵})‘1𝑜) = 𝐵) |
12 | fveq2 6103 | . . . . . 6 ⊢ (𝐶 = 1𝑜 → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = (◡({𝐴} +𝑐 {𝐵})‘1𝑜)) | |
13 | 1n0 7462 | . . . . . . . 8 ⊢ 1𝑜 ≠ ∅ | |
14 | neeq1 2844 | . . . . . . . 8 ⊢ (𝐶 = 1𝑜 → (𝐶 ≠ ∅ ↔ 1𝑜 ≠ ∅)) | |
15 | 13, 14 | mpbiri 247 | . . . . . . 7 ⊢ (𝐶 = 1𝑜 → 𝐶 ≠ ∅) |
16 | ifnefalse 4048 | . . . . . . 7 ⊢ (𝐶 ≠ ∅ → if(𝐶 = ∅, 𝐴, 𝐵) = 𝐵) | |
17 | 15, 16 | syl 17 | . . . . . 6 ⊢ (𝐶 = 1𝑜 → if(𝐶 = ∅, 𝐴, 𝐵) = 𝐵) |
18 | 12, 17 | eqeq12d 2625 | . . . . 5 ⊢ (𝐶 = 1𝑜 → ((◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵) ↔ (◡({𝐴} +𝑐 {𝐵})‘1𝑜) = 𝐵)) |
19 | 11, 18 | syl5ibrcom 236 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 = 1𝑜 → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
20 | 9, 19 | jaod 394 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ((𝐶 = ∅ ∨ 𝐶 = 1𝑜) → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
21 | 3, 20 | syl5 33 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ 2𝑜 → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
22 | 21 | 3impia 1253 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 2𝑜) → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∨ wo 382 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 ∅c0 3874 ifcif 4036 {csn 4125 {cpr 4127 ◡ccnv 5037 ‘cfv 5804 (class class class)co 6549 1𝑜c1o 7440 2𝑜c2o 7441 +𝑐 ccda 8872 |
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 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 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-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 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-ord 5643 df-on 5644 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-1o 7447 df-2o 7448 df-cda 8873 |
This theorem is referenced by: xpsfrn2 16053 xpslem 16056 xpsaddlem 16058 xpsvsca 16062 |
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