An abstract spectral approximation theorem from the theory of semigroups

Mathematics

• Spectral Theorem 99%
• Spectral Approximation 95%
• Approximation Theorem 85%
• Differential operator 62%
• Semigroup 56%
• Hilbert space 52%
• Contraction Semigroup 52%
• Converge 47%
• Approximation Scheme 38%
• Invariance 32%
• Partial differential equation 27%
• Subspace 26%
• Norm 22%
• Standards 20%
• Class 11%

Engineering & Materials Science

• Hilbert spaces 100%
• Invariance 39%
• Partial differential equations 37%