Zero Forcing, Barioli-Fallat tree
A small improvement is made to the zero-forcing variants defined by Butler, Grout, and Hall (2015) for matrices with a given number of negative eigenvalues, resulting in a better value for the Barioli-Fallat tree and one negative eigenvalue.
"A NOTE ON VARIANTS OF ZERO FORCING",
Electronic Journal of Linear Algebra,
Volume 35, pp. 468-472.