COMBINATORICA publishes research papers in English in a variety of areas of combinatorics and the theory of computing, with particular emphasis on general techniques and unifying principles. Typical but not exclusive topics covered by COMBINATORICA are- Combinatorial structures (graphs, hypergraphs, matroids, designs, permutation groups).- Combinatorial optimization.- Combinatorial aspects of geometry and number theory.- Algorithms in combinatorics and related fields.- Computational complexity theory.- Randomization and explicit construction in combinatorics and algorithms.