Step
*
of Lemma
fl-morph-fl1
∀[J,I:fset(ℕ)]. ∀[f:J ⟶ I]. ∀[x:names(I)].  (((x=1))<f> = dM-to-FL(J;f x) ∈ Point(face_lattice(J)))
BY
{ Auto }
Latex:
Latex:
\mforall{}[J,I:fset(\mBbbN{})].  \mforall{}[f:J  {}\mrightarrow{}  I].  \mforall{}[x:names(I)].    (((x=1))<f>  =  dM-to-FL(J;f  x))
By
Latex:
Auto
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