@article{oai:teapot.lib.ocha.ac.jp:00034704, author = {Yoshida, Hiroaki}, issue = {1}, journal = {お茶の水女子大學自然科學報告}, month = {Jun}, note = {application/pdf, 紀要論文, We construct the commuting squares of finite dimensional von Neumann algebras based on a pair of cospectral finte graphs. And we have a new doubly-indexed squence of the indices of irreducible subfactors of the hyperfinite factor of type H_1 which are greater than 4.}, pages = {1--27}, title = {COMMUTING SQUARES FROM A PAIR OF COSPECTRAL GRAPHS}, volume = {47}, year = {1996} }