uvcvv1 - Metamath Proof Explorer

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Theorem uvcvv1 22101

Description: The unit vector is one at its designated coordinate. (Contributed by Stefan O'Rear, 3-Feb-2015.)

**Hypotheses**
Ref	Expression
uvcvv.u	⊢ 𝑈 = (𝑅 unitVec 𝐼)
uvcvv.r	⊢ (𝜑 → 𝑅 ∈ 𝑉)
uvcvv.i	⊢ (𝜑 → 𝐼 ∈ 𝑊)
uvcvv.j	⊢ (𝜑 → 𝐽 ∈ 𝐼)
uvcvv1.o	⊢ 1 = (1_r‘𝑅)

**Assertion**
Ref	Expression
uvcvv1	⊢ (𝜑 → ((𝑈‘𝐽)‘𝐽) = 1 )

**Proof of Theorem uvcvv1**
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		uvcvv.u	. . . 4 ⊢ 𝑈 = (𝑅 unitVec 𝐼)
5		uvcvv1.o	. . . 4 ⊢ 1 = (1_r‘𝑅)
6		eqid 2760	. . . 4 ⊢ (0_g‘𝑅) = (0_g‘𝑅)
7	4, 5, 6	uvcvval 22098	. . 3 ⊢ (((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊 ∧ 𝐽 ∈ 𝐼) ∧ 𝐽 ∈ 𝐼) → ((𝑈‘𝐽)‘𝐽) = if(𝐽 = 𝐽, 1 , (0_g‘𝑅)))
8	1, 2, 3, 3, 7	syl31anc 1400	. 2 ⊢ (𝜑 → ((𝑈‘𝐽)‘𝐽) = if(𝐽 = 𝐽, 1 , (0_g‘𝑅)))
9		eqid 2760	. . 3 ⊢ 𝐽 = 𝐽
10		iftrue 4487	. . 3 ⊢ (𝐽 = 𝐽 → if(𝐽 = 𝐽, 1 , (0_g‘𝑅)) = 1 )
11	9, 10	mp1i 14	. 2 ⊢ (𝜑 → if(𝐽 = 𝐽, 1 , (0_g‘𝑅)) = 1 )
12	8, 11	eqtrd 2795	1 ⊢ (𝜑 → ((𝑈‘𝐽)‘𝐽) = 1 )

Colors of variables: wff setvar class

This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ifcif 4481 ‘cfv 6539 (class class class)co 7421 0_gc0g 17616 1_rcur 20413 unitVec cuvc 22094

This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pr 5390

This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-ov 7424 df-oprab 7425 df-mpo 7426 df-uvc 22095

This theorem is used by: uvcf1 22104 uvcresum 22105 frlmssuvc2 22107 frlmup2 22111 uvcn0 43700 0prjspnrel 43757

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