Theorem paddcom 35099

Description: Projective subspace sum commutes. (Contributed by NM, 3-Jan-2012.)

Hypotheses

Ref	Expression
padd0.a	⊢ 𝐴 = (Atoms‘𝐾)
padd0.p	⊢ + = (+𝑃‘𝐾)

Assertion

Ref	Expression
paddcom	⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → (𝑋 + 𝑌) = (𝑌 + 𝑋))

Proof of Theorem paddcom

Dummy variables 𝑞 𝑝 𝑟 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		uncom 3757	. . . 4 ⊢ (𝑋 ∪ 𝑌) = (𝑌 ∪ 𝑋)
2	1	a1i 11	. . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → (𝑋 ∪ 𝑌) = (𝑌 ∪ 𝑋))
3		simpl1 1064	. . . . . . . 8 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝐾 ∈ Lat)
4		simpl2 1065	. . . . . . . . . 10 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑋 ⊆ 𝐴)
5		simprl 794	. . . . . . . . . 10 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑞 ∈ 𝑋)
6	4, 5	sseldd 3604	. . . . . . . . 9 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑞 ∈ 𝐴)
7		eqid 2622	. . . . . . . . . 10 ⊢ (Base‘𝐾) = (Base‘𝐾)
8		padd0.a	. . . . . . . . . 10 ⊢ 𝐴 = (Atoms‘𝐾)
9	7, 8	atbase 34576	. . . . . . . . 9 ⊢ (𝑞 ∈ 𝐴 → 𝑞 ∈ (Base‘𝐾))
10	6, 9	syl 17	. . . . . . . 8 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑞 ∈ (Base‘𝐾))
11		simpl3 1066	. . . . . . . . . 10 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑌 ⊆ 𝐴)
12		simprr 796	. . . . . . . . . 10 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑟 ∈ 𝑌)
13	11, 12	sseldd 3604	. . . . . . . . 9 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑟 ∈ 𝐴)
14	7, 8	atbase 34576	. . . . . . . . 9 ⊢ (𝑟 ∈ 𝐴 → 𝑟 ∈ (Base‘𝐾))
15	13, 14	syl 17	. . . . . . . 8 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → 𝑟 ∈ (Base‘𝐾))
16		eqid 2622	. . . . . . . . 9 ⊢ (join‘𝐾) = (join‘𝐾)
17	7, 16	latjcom 17059	. . . . . . . 8 ⊢ ((𝐾 ∈ Lat ∧ 𝑞 ∈ (Base‘𝐾) ∧ 𝑟 ∈ (Base‘𝐾)) → (𝑞(join‘𝐾)𝑟) = (𝑟(join‘𝐾)𝑞))
18	3, 10, 15, 17	syl3anc 1326	. . . . . . 7 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → (𝑞(join‘𝐾)𝑟) = (𝑟(join‘𝐾)𝑞))
19	18	breq2d 4665	. . . . . 6 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) ∧ (𝑞 ∈ 𝑋 ∧ 𝑟 ∈ 𝑌)) → (𝑝(le‘𝐾)(𝑞(join‘𝐾)𝑟) ↔ 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞)))
20	19	2rexbidva 3056	. . . . 5 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → (∃𝑞 ∈ 𝑋 ∃𝑟 ∈ 𝑌 𝑝(le‘𝐾)(𝑞(join‘𝐾)𝑟) ↔ ∃𝑞 ∈ 𝑋 ∃𝑟 ∈ 𝑌 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞)))
21		rexcom 3099	. . . . 5 ⊢ (∃𝑞 ∈ 𝑋 ∃𝑟 ∈ 𝑌 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞) ↔ ∃𝑟 ∈ 𝑌 ∃𝑞 ∈ 𝑋 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞))
22	20, 21	syl6bb 276	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → (∃𝑞 ∈ 𝑋 ∃𝑟 ∈ 𝑌 𝑝(le‘𝐾)(𝑞(join‘𝐾)𝑟) ↔ ∃𝑟 ∈ 𝑌 ∃𝑞 ∈ 𝑋 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞)))
23	22	rabbidv 3189	. . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → {𝑝 ∈ 𝐴 ∣ ∃𝑞 ∈ 𝑋 ∃𝑟 ∈ 𝑌 𝑝(le‘𝐾)(𝑞(join‘𝐾)𝑟)} = {𝑝 ∈ 𝐴 ∣ ∃𝑟 ∈ 𝑌 ∃𝑞 ∈ 𝑋 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞)})
24	2, 23	uneq12d 3768	. 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → ((𝑋 ∪ 𝑌) ∪ {𝑝 ∈ 𝐴 ∣ ∃𝑞 ∈ 𝑋 ∃𝑟 ∈ 𝑌 𝑝(le‘𝐾)(𝑞(join‘𝐾)𝑟)}) = ((𝑌 ∪ 𝑋) ∪ {𝑝 ∈ 𝐴 ∣ ∃𝑟 ∈ 𝑌 ∃𝑞 ∈ 𝑋 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞)}))
25		eqid 2622	. . 3 ⊢ (le‘𝐾) = (le‘𝐾)
26		padd0.p	. . 3 ⊢ + = (+𝑃‘𝐾)
27	25, 16, 8, 26	paddval 35084	. 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → (𝑋 + 𝑌) = ((𝑋 ∪ 𝑌) ∪ {𝑝 ∈ 𝐴 ∣ ∃𝑞 ∈ 𝑋 ∃𝑟 ∈ 𝑌 𝑝(le‘𝐾)(𝑞(join‘𝐾)𝑟)}))
28	25, 16, 8, 26	paddval 35084	. . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑌 ⊆ 𝐴 ∧ 𝑋 ⊆ 𝐴) → (𝑌 + 𝑋) = ((𝑌 ∪ 𝑋) ∪ {𝑝 ∈ 𝐴 ∣ ∃𝑟 ∈ 𝑌 ∃𝑞 ∈ 𝑋 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞)}))
29	28	3com23 1271	. 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → (𝑌 + 𝑋) = ((𝑌 ∪ 𝑋) ∪ {𝑝 ∈ 𝐴 ∣ ∃𝑟 ∈ 𝑌 ∃𝑞 ∈ 𝑋 𝑝(le‘𝐾)(𝑟(join‘𝐾)𝑞)}))
30	24, 27, 29	3eqtr4d 2666	1 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴) → (𝑋 + 𝑌) = (𝑌 + 𝑋))

Syntax hints:   → wi 4   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  ∃wrex 2913  {crab 2916   ∪ cun 3572   ⊆ wss 3574   class class class wbr 4653  ‘cfv 5888  (class class class)co 6650  Basecbs 15857  lecple 15948  joincjn 16944  Latclat 17045  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-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-lub 16974  df-join 16976  df-lat 17046  df-ats 34554  df-padd 35082

This theorem is referenced by:  paddass  35124  padd12N  35125  pmod2iN  35135  pmodN  35136  pmapjat2  35140