clopen.solutions

Open problems

980 registered problems.

OP-00087 Lean verified
Polynomial-size vertex test for inverse M-matrix intervals
NA · interval matrices · inverse M-matrices · OpenProblemsInNLA
OP-00088 Lean verified
Number of components of a real interval eigenvalue set
NA · interval matrices · OpenProblemsInNLA · real eigenvalues
OP-00201 Partially resolved
Two-vertex certification of nonsingular sign regularity
NA · interval matrices · OpenProblemsInNLA · sign regular matrices · totally nonnegative matrices
OP-00257 Solution claimed
Hardness of the spectral-norm condition number
NA · absolute value equations · condition numbers · interval matrices · OpenProblemsInNLA
OP-00259 Solution claimed
Exact solution hulls for inverse M-matrix intervals
NA · interval matrices · inverse M-matrices · linear systems · OpenProblemsInNLA
OP-00264 Partially resolved
Exact determinant ranges of general tridiagonal interval matrices
NA · determinants · interval matrices · OpenProblemsInNLA · tridiagonal matrices
OP-00265 Partially resolved
Exact solution hulls for tridiagonal interval systems
NA · interval matrices · linear systems · OpenProblemsInNLA · tridiagonal matrices