Jeremy Avigad Yimu Yin Quantifier elimination for the reals with a predicate for the powers of two. 48-59 2007 370 Theor. Comput. Sci. 1-3 http://dx.doi.org/10.1016/j.tcs.2006.10.005 db/journals/tcs/tcs370.html#AvigadY07