@article{paperid:1050153, author = {Zamani, Ali and Sal Moslehian, Mohammad}, title = {Exact and Approximate Operator Parallelism}, journal = {Canadian Mathematical Bulletin}, year = {2015}, volume = {58}, number = {1}, month = {January}, issn = {0008-4395}, pages = {207--224}, numpages = {17}, keywords = {$C^*$-algebra; approximate parallelism; operator parallelism; Hilbert $C^*$-module}, }