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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 4197 | . . . 4 ⊢ (𝐶 ∈ {∅, 1𝑜} → (𝐶 = ∅ ∨ 𝐶 = 1𝑜)) | |
2 | df2o3 7573 | . . . 4 ⊢ 2𝑜 = {∅, 1𝑜} | |
3 | 1, 2 | eleq2s 2719 | . . 3 ⊢ (𝐶 ∈ 2𝑜 → (𝐶 = ∅ ∨ 𝐶 = 1𝑜)) |
4 | xpsc0 16220 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → (◡({𝐴} +𝑐 {𝐵})‘∅) = 𝐴) | |
5 | 4 | adantr 481 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (◡({𝐴} +𝑐 {𝐵})‘∅) = 𝐴) |
6 | fveq2 6191 | . . . . . 6 ⊢ (𝐶 = ∅ → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = (◡({𝐴} +𝑐 {𝐵})‘∅)) | |
7 | iftrue 4092 | . . . . . 6 ⊢ (𝐶 = ∅ → if(𝐶 = ∅, 𝐴, 𝐵) = 𝐴) | |
8 | 6, 7 | eqeq12d 2637 | . . . . 5 ⊢ (𝐶 = ∅ → ((◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵) ↔ (◡({𝐴} +𝑐 {𝐵})‘∅) = 𝐴)) |
9 | 5, 8 | syl5ibrcom 237 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 = ∅ → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
10 | xpsc1 16221 | . . . . . 6 ⊢ (𝐵 ∈ 𝑊 → (◡({𝐴} +𝑐 {𝐵})‘1𝑜) = 𝐵) | |
11 | 10 | adantl 482 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (◡({𝐴} +𝑐 {𝐵})‘1𝑜) = 𝐵) |
12 | fveq2 6191 | . . . . . 6 ⊢ (𝐶 = 1𝑜 → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = (◡({𝐴} +𝑐 {𝐵})‘1𝑜)) | |
13 | 1n0 7575 | . . . . . . . 8 ⊢ 1𝑜 ≠ ∅ | |
14 | neeq1 2856 | . . . . . . . 8 ⊢ (𝐶 = 1𝑜 → (𝐶 ≠ ∅ ↔ 1𝑜 ≠ ∅)) | |
15 | 13, 14 | mpbiri 248 | . . . . . . 7 ⊢ (𝐶 = 1𝑜 → 𝐶 ≠ ∅) |
16 | ifnefalse 4098 | . . . . . . 7 ⊢ (𝐶 ≠ ∅ → if(𝐶 = ∅, 𝐴, 𝐵) = 𝐵) | |
17 | 15, 16 | syl 17 | . . . . . 6 ⊢ (𝐶 = 1𝑜 → if(𝐶 = ∅, 𝐴, 𝐵) = 𝐵) |
18 | 12, 17 | eqeq12d 2637 | . . . . 5 ⊢ (𝐶 = 1𝑜 → ((◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵) ↔ (◡({𝐴} +𝑐 {𝐵})‘1𝑜) = 𝐵)) |
19 | 11, 18 | syl5ibrcom 237 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 = 1𝑜 → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
20 | 9, 19 | jaod 395 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ((𝐶 = ∅ ∨ 𝐶 = 1𝑜) → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
21 | 3, 20 | syl5 34 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ 2𝑜 → (◡({𝐴} +𝑐 {𝐵})‘𝐶) = if(𝐶 = ∅, 𝐴, 𝐵))) |
22 | 21 | 3impia 1261 | 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 383 ∧ wa 384 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∅c0 3915 ifcif 4086 {csn 4177 {cpr 4179 ◡ccnv 5113 ‘cfv 5888 (class class class)co 6650 1𝑜c1o 7553 2𝑜c2o 7554 +𝑐 ccda 8989 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-ord 5726 df-on 5727 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-1o 7560 df-2o 7561 df-cda 8990 |
This theorem is referenced by: xpsfrn2 16230 xpslem 16233 xpsaddlem 16235 xpsvsca 16239 |
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