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THE HARMONIC HEAT FLOW OF ALMOST COMPLEX STRUCTURES

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (9)

We define and study the harmonic heat flow for almost complex structures which are compatible with a Riemannian structure (M,g). This is a tensor-valu......

ON THE SMALLEST BASE IN WHICH A NUMBER HAS A UNIQUE EXPANSION

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (9)

Given a real number x > 0, we determine q(s)(x) := inf U(x), where U(x) is the set of all bases q is an element of (1, 2] for which x has a unique ......

INFINITE ENERGY SOLUTIONS FOR WEAKLY DAMPED QUINTIC WAVE EQUATIONS IN R-3

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (5)

The paper gives a comprehensive study of infinite-energy solutions and their long-time behavior for semi-linear weakly damped wave equations in R-3 wi......

INVERSE PROBLEMS FOR THE FRACTIONAL-LAPLACIAN WITH LOWER ORDER NON-LOCAL PERTURBATIONS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (5)

In this article, we introduce a model featuring a Levy process in a bounded domain with semi-transparent boundary, by considering the fractional Lapla......

MOBIUS DISJOINTNESS FOR NILSEQUENCES ALONG SHORT INTERVALS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (6)

For a nilmanifold G/Gamma, a 1-Lipschitz continuous function F and the Mobius sequence mu(n), we prove a bound on the decay of the averaged short inte......

TWO DETECTION RESULTS OF KHOVANOV HOMOLOGY ON LINKS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (9)

We prove that Khovanov homology with Z/2-coefficients detects the link L7n1 and detects the union of a trefoil and its meridian.

CONVECTION-INDUCED SINGULARITY SUPPRESSION IN THE KELLER-SEGEL AND OTHER NON-LINEAR PDES

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (9)

In this paper we study the effect of the addition of a convective term, and of the resulting increased dissipation rate, on the growth of solutions to......

QUASISYMMETRIC UNIFORMIZATION AND HAUSDORFF DIMENSIONS OF CANTOR CIRCLE JULIA SETS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (7)

For Cantor circle Julia sets of hyperbolic rational maps, we prove that they are quasisymmetrically equivalent to standard Cantor circles (i.e., conne......

SUPER POLY-HARMONIC PROPERTIES, LIOUVILLE THEOREMS AND CLASSIFICATION OF NONNEGATIVE SOLUTIONS TO EQUATIONS INVOLVING HIGHER-ORDER FRACTIONAL LAPLACIANS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (7)

In this paper, we are concerned with the following equations {(-Delta)(m)+ alpha/2 u( x) = f(x, u, Du, center dot center dot center dot), x is an elem......

HAUSDORFF DIMENSION OF ESCAPING SETS OF MEROMORPHIC FUNCTIONS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (9)

We give a complete description of the possible Hausdorff dimensions of escaping sets for meromorphic functions with a finite number of singular values......

GENERIC UNIQUENESS AND STABILITY FOR THE MIXED RAY TRANSFORM

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (9)

We consider the mixed ray transform of tensor fields on a three-dimensional compact simple Riemannian manifold with boundary. We prove the injectivity......

WEAK SIEGEL-WEIL FORMULA FOR M-2(Q) AND ARITHMETIC ON QUATERNIONS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (5)

We prove a weak version of the Siegel-Weil formula on SL2 for the dual pair (SL2, O-2,O-2), where O-2,O-2 is the split orthogonal group. By this formu......

TRAVELLING AND ROTATING SOLUTIONS TO THE GENERALIZED INVISCID SURFACE QUASI-GEOSTROPHIC EQUATION

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (9)

For the generalized surface quasi-geostrophic equation {partial derivative(t)theta + u center dot del theta = 0, in R(2 )x (0, T), u = (perpendicular ......

UNIT GROUPS OF MAXIMAL ORDERS IN TOTALLY DEFINITE QUATERNION ALGEBRAS OVER REAL QUADRATIC FIELDS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (8)

We study a form of refined class number formula (resp. type number formula) for maximal orders in totally definite quaternion algebras over real quadr......

DETERMINANTAL TENSOR PRODUCT SURFACES AND THE METHOD OF MOVING QUADRICS

期刊: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 2021; 374 (7)

A tensor product surface S is an algebraic surface that is defined as the closure of the image of a rational map phi from P-1 x P-1 to P-3. We provide......

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