A k-graph is an ordered couple (V, E) where V is a set and E a set of k-tuples of elements of V; thus, a 2-graph is an ordinary graph. If the notions of the independent set and the chromatic number ...

A mutated version of the flu is causing a wave of infections around the world. Known as subclade K, it may evade the current flu vaccine. Infectious disease doctors say we may be in for a bad flu ...

Alexander Slagg is a freelance writer specializing in technology and education. He is an ongoing contributor to the CDW family of magazines. As students settle back into classroom routines for the ...

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