14 search results - page 1 / 3 » On the Generation and Enumeration of some Classes of Convex ... |
COMBINATORICS
2004
13 years 4 months ago
2004
COMBINATORICS
2006
13 years 4 months ago
2006
Beauquier and Nivat introduced and gave a characterization of the class of pseudo-square polyominoes that tile the plane by translation: a polyomino tiles the plane by translation...
DM
1998
13 years 4 months ago
1998
We introduce three deÿnitions of q-analogs of Motzkin numbers and illustrate some combinatorial interpretations of these q-numbers. We relate the ÿrst class of q-numbers to the ...
DCC
1998
IEEE
13 years 4 months ago
1998
IEEE
We discuss some methods for the enumeration, construction and random generation of isometry classes of block codes using methods from algebraic combinatorics.
EJC
2008
13 years 4 months ago
2008
We introduce a notion of Dyck paths with coloured ascents. For several ways of colouring, when the set of colours is itself some class of lattice paths, we establish bijections be...