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775 papers in math.FA · page 11
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Functions preserve matrix positivity in every dimension
The entrywise calculus and dimension-free positivity preservers, with an Appendix on sphere packings
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No homeomorphism improves every 1/2-Lipschitz function to W_2^{1/2}
The Sobolev space $W_2^{1/2}$: Simultaneous improvement of functions by a homeomorphism of the circle
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Orbital integrals produce piecewise polynomial measures via apolar polynomial transforms
On measures derived from orbital integrals
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Joint spectra of bidisk Clark unitaries equal inner function level sets
Pairs of Clark Unitary Operators on the Bidisk and their Taylor Joint Spectra
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Directional matrices give gradient flows for KMS quantum semigroups
Bimodule KMS Symmetric Quantum Markov Semigroups and Gradient Flows
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Eigenfunction extrema on Sierpinski gasket scale as lambda to d_S/2
The growth of eigenfunction extrema on p.c.f. fractals
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Bi-parameter paraproduct bounds sharp except one case
Notes on Bi-parameter Paraproducts
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Dimension-free operator bounds generalize Tsirelson and CHSH inequalities
Graph Structured Operator Inequalities and Tsirelson-Type Bounds
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15 classes cover non-elliptic faces on joint numerical range boundaries
The joint numerical range of three hermitian $4\times 4$ matrices
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Two quasi-metrics relax contractions to prove unique fixed points
Fixed Point Theorems for Relaxed Asymptotic Contractions via Two Quasi-Metrics
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Submodular functions obey log-free Talagrand bound
Talagrand-Type Correlation Inequalities for Submodular and Supermodular Functions on the Hypercube
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Sorted projections embed point sets with quadratic distortion
Quantitative Bounds for Sorting-Based Permutation-Invariant Embeddings
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Non-Nikodym generated algebras also lack Grothendieck property
The Nikodym and Grothendieck properties of Boolean algebras and rings related to ideals
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Optimizers exist for Wigner concentration over any finite-measure phase space set
On the existence of optimizers for nonlinear time-frequency concentration problems: the Wigner distribution
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Tilted hyperplanes break maximal bounds on most two-step groups
Failure of stability of a maximal operator bound for perturbed Nevo-Thangavelu means
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Lower semicontinuity yields weighted BV structure theorems
Weighted Bounded Variation Revisited
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FTC extends to functions on Wasserstein space
The first Fundamental Theorem of Calculus for functions defined on Wasserstein space
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New condition extends bilinear inequality to negative potentials
Bilinear embedding for divergence-form operators with negative potentials
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Matrices characterize inclusions in weighted L^p spaces
On inclusion relations of weighted $L^p$-type spaces defined in terms of weight function matrices
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Bounded Eisenstein integrals fully characterized on rank-one symmetric spaces
Boundedness of Eisenstein integrals on split rank one semisimple symmetric spaces
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Twisted crossed products form Banach algebras under contractive representations
Twisted crossed products of Banach algebras
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Gamma-convergence of convex functions equals conjugate version in WCG spaces
Gamma-Convergence of Convex Functions, Conjugates, and Subdifferentials
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Doubling weights approximated by meromorphic inner function arguments
Inner approximations of doubling weights with applications to Beurling-Malliavin theory in Toeplitz kernels
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Wiener-Hopf operator norm at least equals symbol L^∞ norm under weak doubling
Lower estimates for the norm and the Kuratowski measure of noncompactness of Wiener-Hopf type operators
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Cyclic finite-order operators modeled as shifts on weighted Dirichlet spaces
Higher order weighted Dirichlet type spaces with poly-superharmonic weights and Dirichlet type operators of finite order
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Entrywise maps preserving sign regularity fully classified
Entrywise preservers of sign regularity
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Real decomposable maps introduce new class of bounded maps
Real decomposable maps on operator systems
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Least-energy solutions exist for super-Liouville equation with even coefficients
Compactness and least energy solutions to the super-Liouville equation on the sphere
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Few product states bound norms of d-local Hamiltonians
Approximating the operator norm of local Hamiltonians via few quantum states
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Pervasiveness equals weak pervasiveness in finite-dim pre-Riesz spaces
A note on disjointness and discrete elements in partially ordered vector spaces
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Fell bundle actions yield Gelfand-Raikov theorem and C*-correspondences
Actions of Fell bundles
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Compact X scattered iff every C_p(X) subspace has complemented c_0
Lotz-Peck-Porta and Rosenthal's theorems for spaces $C_p(X)$
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Gradient descent converges linearly for quadratic optimal transport
Linear Convergence of Gradient Descent for Quadratically Regularized Optimal Transport
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Bounded L^p to L^q operators satisfy weak (p0,a) bounds via exponent relation
A weak type $(p,a)$ criterion for operators, and applications
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Zhang's affine Sobolev inequality holds in expectation for random p-concave functions
On stochastic forms of functional isoperimetric inequalities
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Projection method needs p < ℓ for fractional s
A surprising threshold for the validity of the method of singular projection
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Equal rates decide when planar Sierpinski measures are spectral
On the Spectral Properties of a Class of Planar Sierpinski Self-Affine Measures
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Neural operators enable Tikhonov regularization for ill-posed nonlinear inverses
Neural operators for solving nonlinear inverse problems
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All groups are 1-approximable in the Schatten 1-norm
On $L^1$-approximation of groups
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Optimal targets identified for Lorentz-Zygmund Sobolev embeddings
Optimal Sobolev embeddings for generalized Lorentz-Zygmund spaces
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Norm-to-order operators from C(X) match E-valued measures
Riesz representation theorems for vector lattices and Banach lattices of regular operators
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Perturbed maps with countably many branches keep stable measures
Statistical stability for systems semi-conjugate to pre-piecewise \textit{convex or expanding} maps with countably many branches
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Explicit solution for Christoffel-Minkowski problem in revolution case
Explicit solutions to Christoffel-Minkowski problems and Hessian equations under rotational symmetries
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Sampling theorems bound reconstruction error on manifolds
Sampling theorems for inverse problems on Riemannian manifolds
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Functional Minkowski vectors obey additive kinematic formula
Additive Kinematic Formulas for Functional Minkowski Vectors
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Reduced C*-algebras of infinite groups with free boundaries are selfless
Proximality and selflessness for group C*-algebras
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Wronski determinant turns one function into an orthogonal set
Construction of linearly independent and orthogonal functions in Hilbert function spaces via Wronski determinants
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Finite unit-norm tight frames form simply connected spaces
Simply connectedness of spaces of tight frames
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Geometric programs yield Hölder regularity for operator capacity
Operator capacity, the Brascamp--Lieb inequality and geometric programming
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Koenigs domain geometry controls eigenvalues of composition generators
Eigenvalues for Infinitesimal Generators of Semigroups of Composition Operators