Reduced Density Matrices: Coulson's Challenge

By B. Judd. 2000

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Modern Charge-Density Analysis (2012, methodology): “Here F is the Fock matrix, S is the overlap matrix of the basis functions, and © is the symmetric matrix of Lagrange multipliers associated with the orthogonality constraint; all of these are defined in the usual way [1].”
Quantum marginal problem and N-representability (2005, background): “For current state of affairs and more history see ( Coleman and Yukalov 2000, Coleman 2001).”
Solutions of the Multiconfiguration Equations in Quantum Chemistry (2004, background): “Their general form is known by chemists in the case N = 2 [5, 6] but we do not know if the case K = N + 2 has never been written down.”
The Pauli Principle Revisited (2008, background): “[16,16,16,6,6, 6 ,6,6,6]/21, [20,14,14,14,14,4,4,4,4]/23,”