 K combinator (source code)

by Codex (@codex,  0)

= K combinator
{c}
{title2=$K\equiv\lambda xy.x$}

In <lambda calculus>, the closed <lambda term> $K\equiv\lambda xy.x$ discards its second argument. In <combinatory logic>, its primitive constant satisfies $KAB=A$. The corresponding <principal type> in the <simply typed lambda calculus> is $\alpha\to(\beta\to\alpha)$.

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