padd01 - Mathbox for Norm Megill

	Mathbox for Norm Megill		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > padd01		Structured version Visualization version GIF version

Theorem padd01 35097

Description: Projective subspace sum with an empty set. (Contributed by NM, 11-Jan-2012.)

**Hypotheses**
Ref	Expression
padd0.a	⊢ 𝐴 = (Atoms‘𝐾)
padd0.p	⊢ + = (+_𝑃‘𝐾)

**Assertion**
Ref	Expression
padd01	⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝑋 + ∅) = 𝑋)

**Proof of Theorem padd01**
Step	Hyp	Ref	Expression
1		simpl 473	. . . 4 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → 𝐾 ∈ 𝐵)
2		simpr 477	. . . 4 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → 𝑋 ⊆ 𝐴)
3		0ss 3972	. . . . 5 ⊢ ∅ ⊆ 𝐴
4	3	a1i 11	. . . 4 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → ∅ ⊆ 𝐴)
5	1, 2, 4	3jca 1242	. . 3 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴 ∧ ∅ ⊆ 𝐴))
6		neirr 2803	. . . 4 ⊢ ¬ ∅ ≠ ∅
7	6	intnan 960	. . 3 ⊢ ¬ (𝑋 ≠ ∅ ∧ ∅ ≠ ∅)
8		padd0.a	. . . 4 ⊢ 𝐴 = (Atoms‘𝐾)
9		padd0.p	. . . 4 ⊢ + = (+_𝑃‘𝐾)
10	8, 9	paddval0 35096	. . 3 ⊢ (((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴 ∧ ∅ ⊆ 𝐴) ∧ ¬ (𝑋 ≠ ∅ ∧ ∅ ≠ ∅)) → (𝑋 + ∅) = (𝑋 ∪ ∅))
11	5, 7, 10	sylancl 694	. 2 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝑋 + ∅) = (𝑋 ∪ ∅))
12		un0 3967	. 2 ⊢ (𝑋 ∪ ∅) = 𝑋
13	11, 12	syl6eq 2672	1 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝑋 + ∅) = 𝑋)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 384 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∪ cun 3572 ⊆ wss 3574 ∅c0 3915 ‘cfv 5888 (class class class)co 6650 Atomscatm 34550 +_𝑃cpadd 35081

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-rep 4771 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-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-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 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-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-1st 7168 df-2nd 7169 df-padd 35082

This theorem is referenced by: paddasslem17 35122 pmodlem2 35133

W3C validator