graph 1 1 Sections Graphs Doc

Def reduce(f;k;as) == Case of as; nil k ; a.as' f(a,reduce(f;k;as')) (recursive)

is mentioned by

Def union-reduce(f;g;x;as) == reduce(a,y. InjCase(a; j. f(j,y), g(j,y));x;as)[union-reduce]
Def (xL.P(x)) == reduce(x,b. P(x) b;false;L)[l_bexists]
Def (xL.P(x)) == reduce(x,b. P(x)b;true;L)[l_ball]

In prior sections: mb list 2 list 1 mb list 1

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graph 1 1 Sections Graphs Doc