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Step * of Lemma sigma-elim-unelim

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∀[X:j⊢]. ∀[A:{X ⊢ _}]. ∀[B:{X.A ⊢ _}].  (SigmaUnElim o SigmaElim = 1(X.Σ A B) ∈ X.Σ A B ij⟶ X.Σ A B)
BY
{ PresheafMLTTInstance Obid: ps-sigma-elim-unelim⋅ }

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Latex:

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Latex:
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\mforall{}[X:j\mvdash{}].  \mforall{}[A:\{X  \mvdash{}  \_\}].  \mforall{}[B:\{X.A  \mvdash{}  \_\}].    (SigmaUnElim  o  SigmaElim  =  1(X.\mSigma{}  A  B))


By

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Latex:
PresheafMLTTInstance  Obid:  ps-sigma-elim-unelim\mcdot{}

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