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Mirrors > Home > MPE Home > Th. List > pcovalg | Structured version Visualization version GIF version |
Description: Evaluate the concatenation of two paths. (Contributed by Mario Carneiro, 7-Jun-2014.) |
Ref | Expression |
---|---|
pcoval.2 | ⊢ (𝜑 → 𝐹 ∈ (II Cn 𝐽)) |
pcoval.3 | ⊢ (𝜑 → 𝐺 ∈ (II Cn 𝐽)) |
Ref | Expression |
---|---|
pcovalg | ⊢ ((𝜑 ∧ 𝑋 ∈ (0[,]1)) → ((𝐹(*𝑝‘𝐽)𝐺)‘𝑋) = if(𝑋 ≤ (1 / 2), (𝐹‘(2 · 𝑋)), (𝐺‘((2 · 𝑋) − 1)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pcoval.2 | . . . 4 ⊢ (𝜑 → 𝐹 ∈ (II Cn 𝐽)) | |
2 | pcoval.3 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ (II Cn 𝐽)) | |
3 | 1, 2 | pcoval 24174 | . . 3 ⊢ (𝜑 → (𝐹(*𝑝‘𝐽)𝐺) = (𝑥 ∈ (0[,]1) ↦ if(𝑥 ≤ (1 / 2), (𝐹‘(2 · 𝑥)), (𝐺‘((2 · 𝑥) − 1))))) |
4 | 3 | fveq1d 6776 | . 2 ⊢ (𝜑 → ((𝐹(*𝑝‘𝐽)𝐺)‘𝑋) = ((𝑥 ∈ (0[,]1) ↦ if(𝑥 ≤ (1 / 2), (𝐹‘(2 · 𝑥)), (𝐺‘((2 · 𝑥) − 1))))‘𝑋)) |
5 | breq1 5077 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝑥 ≤ (1 / 2) ↔ 𝑋 ≤ (1 / 2))) | |
6 | oveq2 7283 | . . . . 5 ⊢ (𝑥 = 𝑋 → (2 · 𝑥) = (2 · 𝑋)) | |
7 | 6 | fveq2d 6778 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝐹‘(2 · 𝑥)) = (𝐹‘(2 · 𝑋))) |
8 | 6 | fvoveq1d 7297 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝐺‘((2 · 𝑥) − 1)) = (𝐺‘((2 · 𝑋) − 1))) |
9 | 5, 7, 8 | ifbieq12d 4487 | . . 3 ⊢ (𝑥 = 𝑋 → if(𝑥 ≤ (1 / 2), (𝐹‘(2 · 𝑥)), (𝐺‘((2 · 𝑥) − 1))) = if(𝑋 ≤ (1 / 2), (𝐹‘(2 · 𝑋)), (𝐺‘((2 · 𝑋) − 1)))) |
10 | eqid 2738 | . . 3 ⊢ (𝑥 ∈ (0[,]1) ↦ if(𝑥 ≤ (1 / 2), (𝐹‘(2 · 𝑥)), (𝐺‘((2 · 𝑥) − 1)))) = (𝑥 ∈ (0[,]1) ↦ if(𝑥 ≤ (1 / 2), (𝐹‘(2 · 𝑥)), (𝐺‘((2 · 𝑥) − 1)))) | |
11 | fvex 6787 | . . . 4 ⊢ (𝐹‘(2 · 𝑋)) ∈ V | |
12 | fvex 6787 | . . . 4 ⊢ (𝐺‘((2 · 𝑋) − 1)) ∈ V | |
13 | 11, 12 | ifex 4509 | . . 3 ⊢ if(𝑋 ≤ (1 / 2), (𝐹‘(2 · 𝑋)), (𝐺‘((2 · 𝑋) − 1))) ∈ V |
14 | 9, 10, 13 | fvmpt 6875 | . 2 ⊢ (𝑋 ∈ (0[,]1) → ((𝑥 ∈ (0[,]1) ↦ if(𝑥 ≤ (1 / 2), (𝐹‘(2 · 𝑥)), (𝐺‘((2 · 𝑥) − 1))))‘𝑋) = if(𝑋 ≤ (1 / 2), (𝐹‘(2 · 𝑋)), (𝐺‘((2 · 𝑋) − 1)))) |
15 | 4, 14 | sylan9eq 2798 | 1 ⊢ ((𝜑 ∧ 𝑋 ∈ (0[,]1)) → ((𝐹(*𝑝‘𝐽)𝐺)‘𝑋) = if(𝑋 ≤ (1 / 2), (𝐹‘(2 · 𝑋)), (𝐺‘((2 · 𝑋) − 1)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ifcif 4459 class class class wbr 5074 ↦ cmpt 5157 ‘cfv 6433 (class class class)co 7275 0cc0 10871 1c1 10872 · cmul 10876 ≤ cle 11010 − cmin 11205 / cdiv 11632 2c2 12028 [,]cicc 13082 Cn ccn 22375 IIcii 24038 *𝑝cpco 24163 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-oprab 7279 df-mpo 7280 df-1st 7831 df-2nd 7832 df-map 8617 df-top 22043 df-topon 22060 df-cn 22378 df-pco 24168 |
This theorem is referenced by: pcoval1 24176 pcoval2 24179 pcohtpylem 24182 |
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