Step
*
of Lemma
int_upper_subtype_int_upper
∀[n,m:ℤ].  {n...} ⊆r {m...} supposing m ≤ n
BY
{ Auto }
Latex:
Latex:
\mforall{}[n,m:\mBbbZ{}].    \{n...\}  \msubseteq{}r  \{m...\}  supposing  m  \mleq{}  n
By
Latex:
Auto
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