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Who Cites boolsize?
boolsizeDef  size(a)(p) == Msize(x.if p(x) 1 else 0 fi)
Thm*  a:. size(a)  (a)
msizeDef  Msize(f) ==  i:k. f(i)
Thm*  k:. Msize  (k)
iter_via_intsegDef  Iter(f;u) i:{a..b}. e(i)
Def  == if a<b f(Iter(f;u) i:{a..b-1}. e(i),e(b-1)) else u fi
Def  (recursive)
Thm*  f:(AAA), u:A, a,b:, e:({a..b}A). (Iter(f;u) i:{a..b}. e(i))  A
lt_intDef  i<j == if i<j true ; false fi
Thm*  i,j:. (i<j)  

Syntax:size(a) has structure: boolsize(a)

About:
boolbfalsebtrueifthenelseintnatural_numberaddsubtractless
lambdaapplyfunctionrecursive_def_noticeuniversememberall!abstraction
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WhoCites Definitions DiscreteMath Sections DiscrMathExt Doc