clopen.solutions

Open problems

980 registered problems.

OP-00096 Lean verified
The uniform expansion threshold for Toeplitz symbols with higher-order zeros
NA · eigenvalue asymptotics · OpenProblemsInNLA · Toeplitz matrices
OP-00097 Lean verified
Polynomial conditioning of the cubic C1 spline Schrödinger Toeplitz family
NA · block Toeplitz matrices · condition numbers · isogeometric analysis · OpenProblemsInNLA
OP-00121 Lean verified
A real-valued symbol on a Jordan curve and real Toeplitz spectra
SP · OpenProblemsInNLA · real spectra · Toeplitz matrices
OP-00159 Solution claimed
Widom's canonical distribution conjecture for Toeplitz eigenvalues
SP · eigenvalue distributions · OpenProblemsInNLA · Toeplitz matrices
OP-00248 Solution claimed
A sum-of-squares representation for the Toeplitz commutator form
FA · Böttcher–Wenzel inequality · OpenProblemsInNLA · sums of squares · Toeplitz matrices