recursive -- Ann, Todd and Jack

re·cur·sion  (r-kûrzhn) n. Mathematics 1. An expression, such as a polynomial, each term of which is determined by application of a formula to preceding terms. 2. A formula that generates the successive terms of a recursion. [Late Latin recursi, recursin-, a running back, from Latin recursus, past participle of recurrere, to run back; see recur.] re·cursive adj.

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Ann, Todd, and Jack --all mathematicians -- solve recursions effortlessly.