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Mirrors > Home > MPE Home > Th. List > uvcvv0 | Structured version Visualization version GIF version |
Description: The unit vector is zero at its designated coordinate. (Contributed by Stefan O'Rear, 3-Feb-2015.) |
Ref | Expression |
---|---|
uvcvv.u | ⊢ 𝑈 = (𝑅 unitVec 𝐼) |
uvcvv.r | ⊢ (𝜑 → 𝑅 ∈ 𝑉) |
uvcvv.i | ⊢ (𝜑 → 𝐼 ∈ 𝑊) |
uvcvv.j | ⊢ (𝜑 → 𝐽 ∈ 𝐼) |
uvcvv0.k | ⊢ (𝜑 → 𝐾 ∈ 𝐼) |
uvcvv0.jk | ⊢ (𝜑 → 𝐽 ≠ 𝐾) |
uvcvv0.z | ⊢ 0 = (0g‘𝑅) |
Ref | Expression |
---|---|
uvcvv0 | ⊢ (𝜑 → ((𝑈‘𝐽)‘𝐾) = 0 ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uvcvv.r | . . 3 ⊢ (𝜑 → 𝑅 ∈ 𝑉) | |
2 | uvcvv.i | . . 3 ⊢ (𝜑 → 𝐼 ∈ 𝑊) | |
3 | uvcvv.j | . . 3 ⊢ (𝜑 → 𝐽 ∈ 𝐼) | |
4 | uvcvv0.k | . . 3 ⊢ (𝜑 → 𝐾 ∈ 𝐼) | |
5 | uvcvv.u | . . . 4 ⊢ 𝑈 = (𝑅 unitVec 𝐼) | |
6 | eqid 2610 | . . . 4 ⊢ (1r‘𝑅) = (1r‘𝑅) | |
7 | uvcvv0.z | . . . 4 ⊢ 0 = (0g‘𝑅) | |
8 | 5, 6, 7 | uvcvval 19944 | . . 3 ⊢ (((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊 ∧ 𝐽 ∈ 𝐼) ∧ 𝐾 ∈ 𝐼) → ((𝑈‘𝐽)‘𝐾) = if(𝐾 = 𝐽, (1r‘𝑅), 0 )) |
9 | 1, 2, 3, 4, 8 | syl31anc 1321 | . 2 ⊢ (𝜑 → ((𝑈‘𝐽)‘𝐾) = if(𝐾 = 𝐽, (1r‘𝑅), 0 )) |
10 | uvcvv0.jk | . . . 4 ⊢ (𝜑 → 𝐽 ≠ 𝐾) | |
11 | nesym 2838 | . . . 4 ⊢ (𝐽 ≠ 𝐾 ↔ ¬ 𝐾 = 𝐽) | |
12 | 10, 11 | sylib 207 | . . 3 ⊢ (𝜑 → ¬ 𝐾 = 𝐽) |
13 | 12 | iffalsed 4047 | . 2 ⊢ (𝜑 → if(𝐾 = 𝐽, (1r‘𝑅), 0 ) = 0 ) |
14 | 9, 13 | eqtrd 2644 | 1 ⊢ (𝜑 → ((𝑈‘𝐽)‘𝐾) = 0 ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 ifcif 4036 ‘cfv 5804 (class class class)co 6549 0gc0g 15923 1rcur 18324 unitVec cuvc 19940 |
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-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 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-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 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-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-uvc 19941 |
This theorem is referenced by: uvcf1 19950 uvcresum 19951 frlmssuvc1 19952 frlmsslsp 19954 frlmup2 19957 |
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