A new concept for block operator matrices:The quadratic numerical range

Keyphrases

• Block Operator Matrix 100%
• Quadratic numerical Range 100%
• Riccati Equation 33%
• Resolvent 33%
• Invariant Subspace 33%
• Schur Complement 33%
• Solution Existence 33%
• Factorization Theorem 33%
• Operator Representation 33%
• Block Diagonalization 33%
• Spectral Inclusion 33%
• Spectral Invariants 33%
• Inclusion Theorem 33%

Mathematics

• Operator Matrix 100%
• Numerical Range 100%
• Main Result 33%
• Riccati Equation 33%
• Resolvent 33%
• Matrix Case 33%
• Schur Complement 33%
• Factorization Theorem 33%
• Spectral Invariant 33%