Some postage stamp 2-bases.
Robinson, John P. (2009)
Journal of Integer Sequences [electronic only]
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Robinson, John P. (2009)
Journal of Integer Sequences [electronic only]
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Challis, Michael F., Robinson, John P. (2010)
Journal of Integer Sequences [electronic only]
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Siao Hong, Shuangnian Hu, Shaofang Hong (2016)
Open Mathematics
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Let f be an arithmetic function and S = {x1, …, xn} be a set of n distinct positive integers. By (f(xi, xj)) (resp. (f[xi, xj])) we denote the n × n matrix having f evaluated at the greatest common divisor (xi, xj) (resp. the least common multiple [xi, xj]) of x, and xj as its (i, j)-entry, respectively. The set S is said to be gcd closed if (xi, xj) ∈ S for 1 ≤ i, j ≤ n. In this paper, we give formulas for the determinants of the matrices (f(xi, xj)) and (f[xi, xj]) if S consists of...
Ruch, David K. (2006)
International Journal of Mathematics and Mathematical Sciences
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Felix Adalbert Behrend (1938)
Časopis pro pěstování matematiky a fysiky
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Lee, Jaewoo (2010)
Integers
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Yang, Quan-Hui, Chen, Feng-Juan (2011)
Integers
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Svein Mossige (1987)
Mathematica Scandinavica
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Singh, Kuldip (1978)
International Journal of Mathematics and Mathematical Sciences
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Chappelon, Jonathan (2008)
Integers
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K. John, V. Zizler (1977)
Compositio Mathematica
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