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Head Normal Form
(redirected from Beta normal form)

    Also found in: Wikipedia 0.03 sec.
(theory, reduction)Head Normal Form - (HNF) A term describing a lambda expression whose top level is either a variable, a data value, a built-in function applied to too few arguments, or a lambda abstraction whose body is not reducible. I.e. the top level is neither a redex nor a lambda abstraction with a reducible body.

An expression in HNF may contain redexes in argument postions whereas a normal form may not.

Compare Weak Head Normal Form.


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