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Step * of Lemma rank-rep-decompose

∀[P:pi_term()]. pi-rank(P) = (pi-rank(pirep-body(P)) + 1) ∈ ℕ supposing ↑pirep?(P)
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1
1. P : pi_term()
2. ↑pirep?(P)
⊢ pi-rank(P) = (pi-rank(pirep-body(P)) + 1) ∈ ℕ

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Latex:

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Latex:
\mforall{}[P:pi\_term()].  pi-rank(P)  =  (pi-rank(pirep-body(P))  +  1)  supposing  \muparrow{}pirep?(P)


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