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Theorem islvol 40388
Description: The predicate "is a 3-dim lattice volume". (Contributed by NM, 1-Jul-2012.)
Hypotheses
Ref Expression
lvolset.b 𝐵 = (Base‘𝐾)
lvolset.c 𝐶 = ( ⋖ ‘𝐾)
lvolset.p 𝑃 = (LPlanes‘𝐾)
lvolset.v 𝑉 = (LVols‘𝐾)
Assertion
Ref Expression
islvol (𝐾𝐴 → (𝑋𝑉 ↔ (𝑋𝐵 ∧ ∃𝑦𝑃 𝑦𝐶𝑋)))
Distinct variable groups:   𝑦,𝑃   𝑦,𝐾   𝑦,𝑋
Allowed substitution hints:   𝐴(𝑦)   𝐵(𝑦)   𝐶(𝑦)   𝑉(𝑦)

Proof of Theorem islvol
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 lvolset.b . . . 4 𝐵 = (Base‘𝐾)
2 lvolset.c . . . 4 𝐶 = ( ⋖ ‘𝐾)
3 lvolset.p . . . 4 𝑃 = (LPlanes‘𝐾)
4 lvolset.v . . . 4 𝑉 = (LVols‘𝐾)
51, 2, 3, 4lvolset 40387 . . 3 (𝐾𝐴𝑉 = {𝑥𝐵 ∣ ∃𝑦𝑃 𝑦𝐶𝑥})
65eleq2d 2852 . 2 (𝐾𝐴 → (𝑋𝑉𝑋 ∈ {𝑥𝐵 ∣ ∃𝑦𝑃 𝑦𝐶𝑥}))
7 breq2 5118 . . . 4 (𝑥 = 𝑋 → (𝑦𝐶𝑥𝑦𝐶𝑋))
87rexbidv 3192 . . 3 (𝑥 = 𝑋 → (∃𝑦𝑃 𝑦𝐶𝑥 ↔ ∃𝑦𝑃 𝑦𝐶𝑋))
98elrab 3653 . 2 (𝑋 ∈ {𝑥𝐵 ∣ ∃𝑦𝑃 𝑦𝐶𝑥} ↔ (𝑋𝐵 ∧ ∃𝑦𝑃 𝑦𝐶𝑋))
106, 9bitrdi 290 1 (𝐾𝐴 → (𝑋𝑉 ↔ (𝑋𝐵 ∧ ∃𝑦𝑃 𝑦𝐶𝑋)))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wb 209  wa 401   = wceq 1570  wcel 2146  wrex 3092  {crab 3419   class class class wbr 5114  cfv 6543  Basecbs 17294  ccvr 40077  LPlanesclpl 40307  LVolsclvol 40308
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2738  ax-sep 5262  ax-nul 5274  ax-pr 5409
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-nfc 2915  df-ne 2962  df-ral 3083  df-rex 3093  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4290  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-br 5115  df-opab 5179  df-mpt 5198  df-id 5561  df-xp 5672  df-rel 5673  df-cnv 5674  df-co 5675  df-dm 5676  df-iota 6499  df-fun 6545  df-fv 6551  df-lvols 40315
This theorem is used by:  islvol4  40389  lvoli  40390  lvolbase  40393  lvolnle3at  40397
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