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@article{MS2_1985__56_166935, author = {Kenneth R. Davidson}, title = {Almost commuting {Hermitian} matrices.}, journal = {Mathematica Scandinavica}, pages = {222--240}, publisher = {mathdoc}, volume = {56}, year = {1985}, zbl = {0563.15010}, url = {http://geodesic.mathdoc.fr/item/MS2_1985__56_166935/} }
Kenneth R. Davidson. Almost commuting Hermitian matrices.. Mathematica Scandinavica, Tome 56 (1985), pp. 222-240. http://geodesic.mathdoc.fr/item/MS2_1985__56_166935/