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Theorem lvolbase 40166
Description: A 3-dim lattice volume is a lattice element. (Contributed by NM, 1-Jul-2012.)
Hypotheses
Ref Expression
lvolbase.b 𝐵 = (Base‘𝐾)
lvolbase.v 𝑉 = (LVols‘𝐾)
Assertion
Ref Expression
lvolbase (𝑋𝑉𝑋𝐵)

Proof of Theorem lvolbase
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 n0i 4292 . . . 4 (𝑋𝑉 → ¬ 𝑉 = ∅)
2 lvolbase.v . . . . 5 𝑉 = (LVols‘𝐾)
32eqeq1i 2766 . . . 4 (𝑉 = ∅ ↔ (LVols‘𝐾) = ∅)
41, 3sylnib 330 . . 3 (𝑋𝑉 → ¬ (LVols‘𝐾) = ∅)
5 fvprc 6855 . . 3 𝐾 ∈ V → (LVols‘𝐾) = ∅)
64, 5nsyl2 141 . 2 (𝑋𝑉𝐾 ∈ V)
7 lvolbase.b . . . 4 𝐵 = (Base‘𝐾)
8 eqid 2761 . . . 4 ( ⋖ ‘𝐾) = ( ⋖ ‘𝐾)
9 eqid 2761 . . . 4 (LPlanes‘𝐾) = (LPlanes‘𝐾)
107, 8, 9, 2islvol 40161 . . 3 (𝐾 ∈ V → (𝑋𝑉 ↔ (𝑋𝐵 ∧ ∃𝑥 ∈ (LPlanes‘𝐾)𝑥( ⋖ ‘𝐾)𝑋)))
1110simprbda 502 . 2 ((𝐾 ∈ V ∧ 𝑋𝑉) → 𝑋𝐵)
126, 11mpancom 698 1 (𝑋𝑉𝑋𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1559  wcel 2141  wrex 3085  Vcvv 3453  c0 4285   class class class wbr 5099  cfv 6517  Basecbs 17228  ccvr 39850  LPlanesclpl 40080  LVolsclvol 40081
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5245  ax-nul 5255  ax-pr 5389
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-rab 3414  df-v 3455  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-br 5100  df-opab 5162  df-mpt 5181  df-id 5540  df-xp 5651  df-rel 5652  df-cnv 5653  df-co 5654  df-dm 5655  df-iota 6473  df-fun 6519  df-fv 6525  df-lvols 40088
This theorem is referenced by:  islvol2  40168  lvolnle3at  40170  lvolneatN  40176  lvolnelln  40177  lvolnelpln  40178  lplncvrlvol2  40203  lvolcmp  40205  2lplnja  40207
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