Mahler measure of the Horie unit and Weber's class number problem in the cyclotomic ℤ₃-extension of ℚ
We prove that every cyclic cubic extension of the field of rational numbers contains algebraic numbers which are Mahler measures but not the Mahler measures of algebraic numbers lying in . This extends the result of Schinzel who proved the same statement for every real quadratic field . A corresponding conjecture is made for an arbitrary non-totally complex field and some numerical examples are given. We also show that every natural power of a Mahler measure is a Mahler measure.