Step * 1 of Lemma fl-join_wf


1. fset(ℕ)
2. : 𝔽(I)
3. : 𝔽(I)
⊢ fl-join(I;x;y) ∈ 𝔽(I)
BY
All (RepUR ``I_cube face-presheaf functor-ob``) }

1
1. fset(ℕ)
2. Point(face_lattice(I))
3. Point(face_lattice(I))
⊢ fl-join(I;x;y) ∈ Point(face_lattice(I))


Latex:


Latex:

1.  I  :  fset(\mBbbN{})
2.  x  :  \mBbbF{}(I)
3.  y  :  \mBbbF{}(I)
\mvdash{}  fl-join(I;x;y)  \mmember{}  \mBbbF{}(I)


By


Latex:
All  (RepUR  ``I\_cube  face-presheaf  functor-ob``)




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