Displaying similar documents to “The Coordinex Problem and Its Relation to the Conjecture of Wilkinson.”

An update on a few permanent conjectures

Fuzhen Zhang (2016)

Special Matrices

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We review and update on a few conjectures concerning matrix permanent that are easily stated, understood, and accessible to general math audience. They are: Soules permanent-on-top conjecture†, Lieb permanent dominance conjecture, Bapat and Sunder conjecture† on Hadamard product and diagonal entries, Chollet conjecture on Hadamard product, Marcus conjecture on permanent of permanents, and several other conjectures. Some of these conjectures are recently settled; some are still open.We...

A counterexample to the Drury permanent conjecture

George Hutchinson (2017)

Special Matrices

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We offer a counterexample to a conjecture concerning the permanent of positive semidefinite matrices. The counterexample is a 4 × 4 complex correlation matrix.

On the Collatz conjecture

Sebastian Hebda (2013)

Colloquium Mathematicae

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We propose two conjectures which imply the Collatz conjecture. We give a numerical evidence for the second conjecture.