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» Parameterizing by the Number of Numbers
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122
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JCT
2008
103views more  JCT 2008»
15 years 5 months ago
A bijective proof of Jackson's formula for the number of factorizations of a cycle
Factorizations of the cyclic permutation (1 2 . . . N) into two permutations with respectively n and m cycles, or, equivalently, unicellular bicolored maps with N edges and n whit...
Gilles Schaeffer, Ekaterina A. Vassilieva
76
Voted
JCT
2008
63views more  JCT 2008»
15 years 5 months ago
On the chromatic number of an oriented matroid
Winfried Hochstättler, Robert Nickel
140
Voted
CORR
2007
Springer
93views Education» more  CORR 2007»
15 years 5 months ago
Type-IV DCT, DST, and MDCT algorithms with reduced numbers of arithmetic operations
We present algorithms for the type-IV discrete cosine transform (DCT-IV) and discrete sine transform (DST-IV), as well as for the modified discrete cosine transform (MDCT) and it...
Xuancheng Shao, Steven G. Johnson
CORR
2007
Springer
106views Education» more  CORR 2007»
15 years 5 months ago
Betti numbers of semi-algebraic sets defined by partly quadratic systems of polynomials
Saugata Basu, Dmitrii V. Pasechnik, Marie-Fran&cce...