The trace norm of r-partite graphs and matrices
The trace norm of graphs has been widely studied under the name graph energy. This note presents bounds on the maximum trace norm of an r-partite graph of order n. The lower bounds come from conference and Hadamard matrices.
Comptes Rendus Mathematique
Nikiforov, V. (2015). The trace norm of r-partite graphs and matrices. Comptes Rendus Mathematique, 353 (6), 471-475. https://doi.org/10.1016/j.crma.2015.03.013