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

Theorem lvoli 36715
Description: Condition implying 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
lvoli (((𝐾𝐷𝑌𝐵𝑋𝑃) ∧ 𝑋𝐶𝑌) → 𝑌𝑉)

Proof of Theorem lvoli
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 simpl2 1188 . 2 (((𝐾𝐷𝑌𝐵𝑋𝑃) ∧ 𝑋𝐶𝑌) → 𝑌𝐵)
2 breq1 5072 . . . 4 (𝑥 = 𝑋 → (𝑥𝐶𝑌𝑋𝐶𝑌))
32rspcev 3626 . . 3 ((𝑋𝑃𝑋𝐶𝑌) → ∃𝑥𝑃 𝑥𝐶𝑌)
433ad2antl3 1183 . 2 (((𝐾𝐷𝑌𝐵𝑋𝑃) ∧ 𝑋𝐶𝑌) → ∃𝑥𝑃 𝑥𝐶𝑌)
5 simpl1 1187 . . 3 (((𝐾𝐷𝑌𝐵𝑋𝑃) ∧ 𝑋𝐶𝑌) → 𝐾𝐷)
6 lvolset.b . . . 4 𝐵 = (Base‘𝐾)
7 lvolset.c . . . 4 𝐶 = ( ⋖ ‘𝐾)
8 lvolset.p . . . 4 𝑃 = (LPlanes‘𝐾)
9 lvolset.v . . . 4 𝑉 = (LVols‘𝐾)
106, 7, 8, 9islvol 36713 . . 3 (𝐾𝐷 → (𝑌𝑉 ↔ (𝑌𝐵 ∧ ∃𝑥𝑃 𝑥𝐶𝑌)))
115, 10syl 17 . 2 (((𝐾𝐷𝑌𝐵𝑋𝑃) ∧ 𝑋𝐶𝑌) → (𝑌𝑉 ↔ (𝑌𝐵 ∧ ∃𝑥𝑃 𝑥𝐶𝑌)))
121, 4, 11mpbir2and 711 1 (((𝐾𝐷𝑌𝐵𝑋𝑃) ∧ 𝑋𝐶𝑌) → 𝑌𝑉)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208  wa 398  w3a 1083   = wceq 1536  wcel 2113  wrex 3142   class class class wbr 5069  cfv 6358  Basecbs 16486  ccvr 36402  LPlanesclpl 36632  LVolsclvol 36633
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 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2796  ax-sep 5206  ax-nul 5213  ax-pr 5333
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2966  df-ral 3146  df-rex 3147  df-rab 3150  df-v 3499  df-sbc 3776  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-nul 4295  df-if 4471  df-sn 4571  df-pr 4573  df-op 4577  df-uni 4842  df-br 5070  df-opab 5132  df-mpt 5150  df-id 5463  df-xp 5564  df-rel 5565  df-cnv 5566  df-co 5567  df-dm 5568  df-iota 6317  df-fun 6360  df-fv 6366  df-lvols 36640
This theorem is referenced by:  lplncvrlvol  36756
  Copyright terms: Public domain W3C validator