Step
*
of Lemma
is-half-interval_wf
∀[I,J:ℚInterval].  (is-half-interval(I;J) ∈ 𝔹)
BY
{ ProveWfLemma }
Latex:
Latex:
\mforall{}[I,J:\mBbbQ{}Interval].    (is-half-interval(I;J)  \mmember{}  \mBbbB{})
By
Latex:
ProveWfLemma
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