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The size of a finite multiset.

Who Cites msize?
msizeDef  Msize(f) ==  i:kf(i)
Thm*  k:. Msize  (k)
iter_via_intsegDef  Iter(f;ui:{a..b}. e(i)
Def  == if a<b f(Iter(f;ui:{a..b-1}. e(i),e(b-1)) else u fi
Def  (recursive)
Thm*  f:(AAA), u:Aa,b:e:({a..b}A). (Iter(f;ui:{a..b}. e(i))  A
lt_intDef  i<j == if i<j true ; false fi
Thm*  i,j:. (i<j 

Syntax:Msize has structure: msize(k)

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WhoCites Definitions DiscreteMath Sections DiscrMathExt Doc