Spectrum, resolvent, numerical range, functional calculus, operator semigroups. Special classes of operators: compact, Fredholm, dissipative, differential, integral, pseudodifferential, etc.

**8**

**2**answers

### Hölder continuity for operators

**2**

**0**answers

### Is singular Cauchy operator bounded in Morrey spaces?

**1**

**1**answer

### The tensor product of two bounded operators

**2**

**0**answers

### Absence of fixed points

**3**

**0**answers

### Compactness of operators of Markov processes

**3**

**1**answer

### Function square-integrable

**2**

**3**answers

### Uniqueness of solution depending on constant?

**2**

**1**answer

### Closeness of points in the irreducible decomposition of a C$^{*}$-algebra representation

**1**

**0**answers

### Relative boundedness of the adjoint

**2**

**1**answer

### Description of (completely) bounded operator

**4**

**0**answers

### Difference Between Eigenvalues of Schrödinger Operator with Different Boundary Conditions

**1**

**0**answers

### Propagation of singularities and the Schrodinger equation

**5**

**1**answer

### Invariant subspace in infinite dimensions

**1**

**1**answer

### $L^2$ function in Schwartz space?

**1**

**1**answer

### Nuclear operators and their eigenvalues

**5**

**0**answers

### What is the generator of the heat semigroup on non-complete manifolds?

**0**

**0**answers

### Uniform convergence in Hadamard derivatives

**1**

**0**answers

### norm of operator between matrix algebras equipped with trace norm [duplicate]

**5**

**0**answers

### Analytic families of compact self-adjoint operators: eigenvalue extension

**4**

**0**answers

### Is this a pseudodifferential operator?

**3**

**1**answer

### Does separability of the strong operator topology imply separability of the underlying space?

**7**

**2**answers

### If the cardinality of $B(X)$, the space of operators on $X$, is continuum, must $X$ be separable?

**13**

**0**answers

### Approximate eigenvectors for a set of non-commuting self-adjoint operators

**0**

**1**answer

### Convergence rate of eigenvectors

**2**

**2**answers

### References for the Spectral Theorem ( Multiplication Operator Form)

**0**

**0**answers

### Spectral projection of a positive operator

**2**

**1**answer

### Are the Prolate Spheroidal Wave Functions absolutely integrable?

**0**

**0**answers

### Spectrum of a Hamiltonian on the real line

**4**

**2**answers

### Bound on sum of $n$th super-diagonal entries in a $2n$ by $2n$ PSD matrix

**2**

**0**answers

### The nonlinear operator defined as the commutator of a matrix and a nonlinear operator

**3**

**1**answer

### The norm of a bounded operator acting on $\operatorname{Im}(M^{1/2})$

**1**

**1**answer

### On projection theory for inseparable Hilbert spaces

**3**

**1**answer

### Is Quantum Mechanics (norm)-consistent?

**13**

**3**answers

### Version of Banach-Steinhaus theorem

**2**

**1**answer

### Lipschitz bound on semigroups

**2**

**0**answers

### Relationship between eigenvalues of compact operators $A$ and $(A+A^*)/2$

**1**

**0**answers

### Projections in properly infinite factor

**6**

**2**answers

### Uniform continuity of heat semigroup

**1**

**1**answer

### $S_M$ is not always homeomorphic to the 1-sphere of $F$

**4**

**1**answer

### $L^2$-valued integral as parameter integral

**2**

**2**answers

### A theorem related to the Hilbert space $\text{Im}(M^{1/2})$ with $M$ is a positive operator

**9**

**1**answer

### Well known matrix inequality?

**5**

**1**answer

### Spectrum of the product of operators

**0**

**0**answers

### Discrete spectrum of Schrodinger operator

**1**

**1**answer

### Expressing a matrix operator as a sum of an identity and a compact operator

**2**

**1**answer

### Determinant of a matrix involving the Prolate Spheroidal Wave Functions

**1**

**1**answer

### Is the canonical map $\mathfrak L(X,E)\:\hat\otimes_\pi\:\mathfrak L(Y,F)\to\mathfrak L(X\:\hat\otimes_\pi\:Y,E\:\hat\otimes_\pi\:F)$ injective?

**1**

**0**answers

### identity involving spectral functions

**5**

**1**answer

### Pointwise convergence in functional calculus

**1**

**1**answer