An abelian surface A is called a QM-abelian surface if its endomorphism ring includes an order of an indefinite quaternion algebra, and a curve C of genus two is called a QM-curve if its jacobianâ€¦ (More)

A general method of constructing families of cyclic polynomials over Q with more than one parameter will be discussed, which may be called a geometric generalization of the Gaussian period relations.â€¦ (More)

We study Noetherâ€™s problem for various subgroups H of the normalizer of a group C8 generated by an 8-cycle in S8, the symmetric group of degree 8, in three aspects according to the way they act onâ€¦ (More)

We study Noetherâ€™s problem for various subgroups H of the normalizer of a group C8 generated by an 8-cycle in S8, the symmetric group of degree 8, in three aspects according to the way they act onâ€¦ (More)