Metamath Proof Explorer


Theorem dalemueb

Description: Lemma for dath . Frequently-used utility lemma. (Contributed by NM, 13-Aug-2012)

Ref Expression
Hypotheses dalema.ph φ K HL C Base K P A Q A R A S A T A U A Y O Z O ¬ C ˙ P ˙ Q ¬ C ˙ Q ˙ R ¬ C ˙ R ˙ P ¬ C ˙ S ˙ T ¬ C ˙ T ˙ U ¬ C ˙ U ˙ S C ˙ P ˙ S C ˙ Q ˙ T C ˙ R ˙ U
dalema.a A = Atoms K
Assertion dalemueb φ U Base K

Proof

Step Hyp Ref Expression
1 dalema.ph φ K HL C Base K P A Q A R A S A T A U A Y O Z O ¬ C ˙ P ˙ Q ¬ C ˙ Q ˙ R ¬ C ˙ R ˙ P ¬ C ˙ S ˙ T ¬ C ˙ T ˙ U ¬ C ˙ U ˙ S C ˙ P ˙ S C ˙ Q ˙ T C ˙ R ˙ U
2 dalema.a A = Atoms K
3 1 dalemuea φ U A
4 eqid Base K = Base K
5 4 2 atbase U A U Base K
6 3 5 syl φ U Base K