Theorem islln 39507

Description: The predicate "is a lattice line". (Contributed by NM, 16-Jun-2012.)

Hypotheses

Ref	Expression
llnset.b	⊢ 𝐵 = (Base‘𝐾)
llnset.c	⊢ 𝐶 = ( ⋖ ‘𝐾)
llnset.a	⊢ 𝐴 = (Atoms‘𝐾)
llnset.n	⊢ 𝑁 = (LLines‘𝐾)

Assertion

Ref	Expression
islln	⊢ (𝐾 ∈ 𝐷 → (𝑋 ∈ 𝑁 ↔ (𝑋 ∈ 𝐵 ∧ ∃𝑝 ∈ 𝐴 𝑝𝐶𝑋)))

Distinct variable groups:   𝐴,𝑝   𝐾,𝑝   𝑋,𝑝

Allowed substitution hints:   𝐵(𝑝)   𝐶(𝑝)   𝐷(𝑝)   𝑁(𝑝)

Proof of Theorem islln

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		llnset.b	. . . 4 ⊢ 𝐵 = (Base‘𝐾)
2		llnset.c	. . . 4 ⊢ 𝐶 = ( ⋖ ‘𝐾)
3		llnset.a	. . . 4 ⊢ 𝐴 = (Atoms‘𝐾)
4		llnset.n	. . . 4 ⊢ 𝑁 = (LLines‘𝐾)
5	1, 2, 3, 4	llnset 39506	. . 3 ⊢ (𝐾 ∈ 𝐷 → 𝑁 = {𝑥 ∈ 𝐵 ∣ ∃𝑝 ∈ 𝐴 𝑝𝐶𝑥})
6	5	eleq2d 2815	. 2 ⊢ (𝐾 ∈ 𝐷 → (𝑋 ∈ 𝑁 ↔ 𝑋 ∈ {𝑥 ∈ 𝐵 ∣ ∃𝑝 ∈ 𝐴 𝑝𝐶𝑥}))
7		breq2 5114	. . . 4 ⊢ (𝑥 = 𝑋 → (𝑝𝐶𝑥 ↔ 𝑝𝐶𝑋))
8	7	rexbidv 3158	. . 3 ⊢ (𝑥 = 𝑋 → (∃𝑝 ∈ 𝐴 𝑝𝐶𝑥 ↔ ∃𝑝 ∈ 𝐴 𝑝𝐶𝑋))
9	8	elrab 3662	. 2 ⊢ (𝑋 ∈ {𝑥 ∈ 𝐵 ∣ ∃𝑝 ∈ 𝐴 𝑝𝐶𝑥} ↔ (𝑋 ∈ 𝐵 ∧ ∃𝑝 ∈ 𝐴 𝑝𝐶𝑋))
10	6, 9	bitrdi 287	1 ⊢ (𝐾 ∈ 𝐷 → (𝑋 ∈ 𝑁 ↔ (𝑋 ∈ 𝐵 ∧ ∃𝑝 ∈ 𝐴 𝑝𝐶𝑋)))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   = wceq 1540   ∈ wcel 2109  ∃wrex 3054  {crab 3408   class class class wbr 5110  ‘cfv 6514  Basecbs 17186   ⋖ ccvr 39262  Atomscatm 39263  LLinesclln 39492

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2702  ax-sep 5254  ax-nul 5264  ax-pr 5390

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2534  df-eu 2563  df-clab 2709  df-cleq 2722  df-clel 2804  df-nfc 2879  df-ne 2927  df-ral 3046  df-rex 3055  df-rab 3409  df-v 3452  df-dif 3920  df-un 3922  df-in 3924  df-ss 3934  df-nul 4300  df-if 4492  df-pw 4568  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-br 5111  df-opab 5173  df-mpt 5192  df-id 5536  df-xp 5647  df-rel 5648  df-cnv 5649  df-co 5650  df-dm 5651  df-iota 6467  df-fun 6516  df-fv 6522  df-llines 39499

This theorem is referenced by:  islln4  39508  llni  39509  llnbase  39510  llnnleat  39514