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For question borderline with, or having application to, computer science. Consider also posting http://cs.stackexchange.com/ or http://cstheory.stackexchange.com/ instead of here, if appropriate.

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Background for Kierstead terms

This example (or a very similar one) first appeared in the literature in Kleene's paper 'Recursive functionals and quantifiers of finite types revisited I' (Proc. Generalized Recursion Theory II, Oslo …
John Longley's user avatar