Well-spread sequences and edge-labellings with constant Hamilton-weight.
Kayll, P. Mark (2004)
Discrete Mathematics and Theoretical Computer Science. DMTCS [electronic only]
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Kayll, P. Mark (2004)
Discrete Mathematics and Theoretical Computer Science. DMTCS [electronic only]
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Veneziani, Pierangela (2008)
The Electronic Journal of Combinatorics [electronic only]
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Talbot, John (2005)
The Electronic Journal of Combinatorics [electronic only]
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Ardal, Hayri (2010)
Integers
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Pedro Freitas, Batłomiej Siudeja (2010)
ESAIM: Control, Optimisation and Calculus of Variations
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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.
Al-Refai, Mohammed, Katatbeh, Qutaibeh (2006)
International Journal of Mathematics and Mathematical Sciences
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Cilleruelo, Javier (2000)
Integers
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Politi, Tiziano, Popolizio, Marina (2008)
JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
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L. Gajek (1987)
Applicationes Mathematicae
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Thanatipanonda, Thotsaporn “Aek" (2009)
The Electronic Journal of Combinatorics [electronic only]
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Bianchi, Monica, Torriero, Anna (2000)
Journal of Inequalities and Applications [electronic only]
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