We experiment with sequential and parallel versions of the Karatsuba multiplication algorithm implemented under the paclib computer algebra system on a Sequent Symmetry shared-memory architecture. In comparison with the classical multiplication algorithm, the sequential version gives a speed-up of 2 at 50 words, up to 5 at 500 words. On 9 processors, the parallel Karatsuba algorithm exhibits a ...

Regular two-graphs on up to 36 vertices are classified, and recently, the classification of regular 38 42 having at least one descendant with a nontrivial automorphism group has been performed. The first unclassified cases those 46 50 vertices. It is known that there 97 leading 2104 descendants 54 785 descendants. In this paper, we classified all strongly graphs parameters (45,22,10,11), (49,24...