Step
*
of Lemma
mdist-symm
∀[X:Type]. ∀[d:metric(X)]. ∀[x,y:X]. (mdist(d;x;y) = mdist(d;y;x))
BY
{ ((Unfold `mdist` 0 THEN Auto) THEN BLemma `metric-symmetry` THEN Auto) }
Latex:
Latex:
\mforall{}[X:Type]. \mforall{}[d:metric(X)]. \mforall{}[x,y:X]. (mdist(d;x;y) = mdist(d;y;x))
By
Latex:
((Unfold `mdist` 0 THEN Auto) THEN BLemma `metric-symmetry` THEN Auto)
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