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Step * of Lemma zhgrp_to_nat_is_hom

IsMonHom{<ℤ+>↓hgrp,<ℕ,+>}(λn.nat(n))
BY
{ ((AGenRepD ["basic";"compound"] 
THENM Force `2` (Reduce 0)) THENA Auto) }

1
1. a1 : |(<ℤ+>↓hgrp)|
2. a2 : |(<ℤ+>↓hgrp)|
⊢ nat(a1 * a2) = (nat(a1) + nat(a2)) ∈ ℕ

2
nat(e) = 0 ∈ ℕ

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Latex:

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Latex:
IsMonHom\{<\mBbbZ{}+>\mdownarrow{}hgrp,<\mBbbN{},+>\}(\mlambda{}n.nat(n))


By

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Latex:
((AGenRepD  ["basic";"compound"] 
THENM  Force  `2`  (Reduce  0))  THENA  Auto)

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