Frobenius numbers by lattice point enumeration.
Einstein, David, Lichtblau, Daniel, Strzebonski, Adam, Wagon, Stan (2007)
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Einstein, David, Lichtblau, Daniel, Strzebonski, Adam, Wagon, Stan (2007)
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Tripathi, Amitabha (2008)
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Tripathi, Amitabha, Vijay, Sujith (2006)
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Peter Růžička, Juraj Wiedermann (1978)
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Pedro Freitas, Batłomiej Siudeja (2010)
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We prove some new upper and lower bounds for the first Dirichlet eigenvalue of triangles and quadrilaterals. In particular, we improve Pólya and Szegö's [ (1951)] lower bound for quadrilaterals and extend Hersch's [ (1966) 457–460] upper bound for parallelograms to general quadrilaterals.
Comellas, Francesc, Yebra, J.Luis A. (2002)
The Electronic Journal of Combinatorics [electronic only]
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R. C. Baker, G. Harman (1995)
Acta Arithmetica
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