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COHERENCY AND CONSTRUCTIONS FOR MONOIDS

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2020; 71 (4)

A monoid S is right coherent if every finitely generated subact of every finitely presented right S-act is finitely presented. This is a finiteness co......

SEPARATING SINGULAR MODULI AND THE PRIMITIVE ELEMENT PROBLEM

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2020; 71 (4)

We prove that vertical bar x - y vertical bar >= 800X(-4), where x and y are distinct singular moduli of discriminants not exceeding X. We apply th......

A BESSEL DELTA METHOD AND EXPONENTIAL SUMS FOR GL(2)

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2020; 71 (3)

In this paper, we introduce a simple Bessel delta-method to the theory of exponential sums for GL(2). Some results of Jutila on exponential sums are g......

ON THE FIRST HOCHSCHILD COHOMOLOGY OF COCOMMUTATIVE HOPF ALGEBRAS OF FINITE REPRESENTATION TYPE

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2020; 71 (3)

Let B-0(G) subset of k G be the principal block algebra of the group algebra k G of an infinitesimal group scheme G over an algebraically closed field......

ON A FORMULA FOR THE REGULARIZED DETERMINANT OF ZETA FUNCTIONS WITH APPLICATION TO SOME DIRICHLET SERIES

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2020; 71 (3)

In this paper, we study a large class of zeta functions. We evaluate explicitly the special values of these zeta functions and the associated derivati......

GRADIENT AND HESSIAN ESTIMATES FOR DIRICHLET AND NEUMANN EIGENFUNCTIONS

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2020; 71 (1)

We establish integral formulas and sharp two-sided bounds for the Ricci curvature, mean curvature and second fundamental form on a Riemannian manifold......

NUMBER OF PRIME FACTORS OVER ARITHMETIC PROGRESSIONS

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2020; 71 (1)

Numerical experiments suggest that there are more prime factors in certain arithmetic progressions than others. Greg Martin conjectured that the funct......

INDUCED REPRESENTATIONS OF MINIMAL ORBITS FOR CLASSICAL GROUPS

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (1)

In this paper, we study the induced representation Ind(G)(G)x(V-tau) with O-X the minimal nilpotent orbit of classical complex Lie group G and V-tau a......

JIF:0.64

TOPOLOGICAL SYMMETRIES OF R-3

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (1)

If a finite group G acts topologically and faithfully on R-3, then G is isomorphic to a subgroup of O(3).

JIF:0.64

SYMPLECTIC PARABOLICITY AND L-2 SYMPLECTIC HARMONIC FORMS

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (1)

In this paper, we study the symplectic cohomologies and symplectic harmonic forms which introduced by Tseng and Yau. Based on this, we get if (M-2n, o......

JIF:0.64

Stably free cancellation for group rings of metacyclic type

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (2)

Let p,q be primes such that q p-1. Write Fn for the free group of rank n >= 1 and let G(p,q)=Cp?Cq. We show that any stably free module over Z[G(p,......

JIF:0.64

Metric semi-groups of normal states determine F-algebras

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (2)

Let A be an F-algebra and S(A*) be the metric semi-group of normal states of the W*-algebra A*. We show that S(A*) determines A, when A* is of type I.......

JIF:0.64

DIFFERENTIAL OPERATORS ON POLAR HARMONIC MAASS FORMS AND ELLIPTIC DUALITY

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (4)

In this paper, we study polar harmonic Maass forms of negative integral weight. Using work of Fay, we construct Poincare series which span the space o......

JIF:0.64

ON A CONJECTURE OF ADDITIVE COMPLEMENTS

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (3)

For two infinite sequences A and B of non-negative integers, if every sufficiently large integer can be expressed as the sum of two elements taken fro......

JIF:0.64

QUANTITATIVE NON-VANISHING RESULTS ON L-FUNCTIONS

期刊: QUARTERLY JOURNAL OF MATHEMATICS, 2019; 70 (3)

In this paper, we establish a quantitative non-vanishing result on a class of twisted L-functions. A(s, c) of degree k, which satisfy some mild and st......

JIF:0.64

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