Hotel management in Ergodia Available to Purchase

During an airport stopover in Europe recently, I had the pleasure of seeing again my two friends, the twin brothers Fritz U. Einwand and Hans W. Einwand. They still looked alike, to the same degree that used to confuse me when I saw them across the net of a tennis court in Ann Arbor—and to the same degree, no doubt, that prompted their parents to give them their humorous middle names. I learned that they had become famous in the field of hotel management by contributing a sound mathematical development, based on studies made in their home country, Ergodia. The twins kindly loaned me a copy of a recent comprehensive report on their work.