SIAM Journal on Applied Mathematics, Vol. 32, No. 1 (Jan., 1977), pp. 215-219 (5 pages) An analysis that progresses recursively along the terms of a linear equation generates a simple algebraic ...
An old conjecture of Sierpiński asserts that for every integer k ≥ 2, there is a number m for which the equation φ (x) = m has exactly k solutions. Here φ is Euler's totient function. In 1961, ...
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