22 citations · 53 across the 16 of their papers we have counts for
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math.OA2009★ 2 cited
Fundamental group of simple -algebras with unique trace II
Norio Nawata, Yasuo Watatani
We show that any countable subgroup of the multiplicative group of positive real numbers can be realized as the fundamental group of a sepa…
math.OA2009★ 2 cited
-algebras associated with real multiplication
Norio Nawata
Noncommutative tori with real multiplication are the irrational rotation algebras that have special equivalence bimodules. Y. Manin proposed the use of noncommutative tori with rea…
math.OA2009★ 4 cited
Fundamental group of simple -algebras with unique trace
Norio Nawata, Yasuo Watatani
We introduce the fundamental group of a unital simple -algebra with a unique normalized trace. We compute fundamental groups of several…