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COMBINATORICS
2007
15 years 6 months ago
2007
By introducing the notion of relative derangements of type B, also called signed relative derangements, which are defined in terms of signed permutations, we obtain a type B anal...
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COMBINATORICS
2007
15 years 6 months ago
2007
Sommerville and Davies classified the spherical triangles that can tile the sphere in an edge-to-edge fashion. However, if the edge-to-edge restriction is relaxed, there are othe...
142
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COMBINATORICS
2007
15 years 6 months ago
2007
For a permutation π = π1π2 · · · πn ∈ Sn and a positive integer i ≤ n, we can view π1π2 · · · πi as an element of Si by order-preserving relabeling. The j-set of ...
143
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COMPUTING
2007
15 years 6 months ago
2007
In this paper, we propose an approach to the computation of more accurate divided differences for the interpolation in the Newton form of the matrix exponential propagator ϕ(hA)v...
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COMSIS
2007
15 years 6 months ago
2007
A prototype compiler of the ST language (Structured Text), its operation and internal structure is presented. The compiler is a principal part of CPDev engineering environment for ...