American Mathematical Society - “Ola Bratteli is known first and foremost for what are now called Bratteli diagrams, a kind of infinite, bifurcating, graded graph. He showed how these diagrams (cousins of
Tone Bratteli, Trond Digernes, George Elliott, David E. Evans, Palle E. Jorgensen, Aki Kishimoto, Magnus B. Landstad, Derek Robi
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