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Theorem islpln 40031
Description: The predicate "is a lattice plane". (Contributed by NM, 16-Jun-2012.)
Hypotheses
Ref Expression
lplnset.b 𝐵 = (Base‘𝐾)
lplnset.c 𝐶 = ( ⋖ ‘𝐾)
lplnset.n 𝑁 = (LLines‘𝐾)
lplnset.p 𝑃 = (LPlanes‘𝐾)
Assertion
Ref Expression
islpln (𝐾𝐴 → (𝑋𝑃 ↔ (𝑋𝐵 ∧ ∃𝑦𝑁 𝑦𝐶𝑋)))
Distinct variable groups:   𝑦,𝑁   𝑦,𝐾   𝑦,𝑋
Allowed substitution hints:   𝐴(𝑦)   𝐵(𝑦)   𝐶(𝑦)   𝑃(𝑦)

Proof of Theorem islpln
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 lplnset.b . . . 4 𝐵 = (Base‘𝐾)
2 lplnset.c . . . 4 𝐶 = ( ⋖ ‘𝐾)
3 lplnset.n . . . 4 𝑁 = (LLines‘𝐾)
4 lplnset.p . . . 4 𝑃 = (LPlanes‘𝐾)
51, 2, 3, 4lplnset 40030 . . 3 (𝐾𝐴𝑃 = {𝑥𝐵 ∣ ∃𝑦𝑁 𝑦𝐶𝑥})
65eleq2d 2825 . 2 (𝐾𝐴 → (𝑋𝑃𝑋 ∈ {𝑥𝐵 ∣ ∃𝑦𝑁 𝑦𝐶𝑥}))
7 breq2 5077 . . . 4 (𝑥 = 𝑋 → (𝑦𝐶𝑥𝑦𝐶𝑋))
87rexbidv 3163 . . 3 (𝑥 = 𝑋 → (∃𝑦𝑁 𝑦𝐶𝑥 ↔ ∃𝑦𝑁 𝑦𝐶𝑋))
98elrab 3629 . 2 (𝑋 ∈ {𝑥𝐵 ∣ ∃𝑦𝑁 𝑦𝐶𝑥} ↔ (𝑋𝐵 ∧ ∃𝑦𝑁 𝑦𝐶𝑋))
106, 9bitrdi 288 1 (𝐾𝐴 → (𝑋𝑃 ↔ (𝑋𝐵 ∧ ∃𝑦𝑁 𝑦𝐶𝑋)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396   = wceq 1547  wcel 2119  wrex 3063  {crab 3391   class class class wbr 5073  cfv 6486  Basecbs 17171  ccvr 39763  LLinesclln 39992  LPlanesclpl 39993
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2711  ax-sep 5219  ax-nul 5229  ax-pr 5363
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2718  df-cleq 2731  df-clel 2814  df-nfc 2888  df-ne 2935  df-ral 3054  df-rex 3064  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4263  df-if 4456  df-pw 4532  df-sn 4557  df-pr 4559  df-op 4563  df-uni 4840  df-br 5074  df-opab 5136  df-mpt 5155  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-iota 6442  df-fun 6488  df-fv 6494  df-lplanes 40000
This theorem is referenced by:  islpln4  40032  lplni  40033  lplnbase  40035  lplnnle2at  40042
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