Publications (90)
Tensor Decompositions for Modeling Inverse Dynamics
Stephan Baier, Volker Tresp
Modeling inverse dynamics is crucial for accurate feedforward robot control. The model computes the necessary joint torques, to perform a desired movement. The highly non-linear in…
The square sieve and the large sieve with square moduli
Stephan Baier
We give a short alternative proof using Heath-Brown's square sieve of a bound of the author for the large sieve with square moduli.
Quadratic congruences on average and rational points on cubic surfaces
Stephan Baier, Ulrich Derenthal
We investigate the average number of solutions of certain quadratic congruences. As an application, we establish Manin's conjecture for a cubic surface whose singularity type is A_…
Learning with Memory Embeddings
Volker Tresp, Cristóbal Esteban, Yinchong Yang +2
Embedding learning, a.k.a. representation learning, has been shown to be able to model large-scale semantic knowledge graphs. A key concept is a mapping of the knowledge graph to a…
Improving Visual Relationship Detection using Semantic Modeling of Scene Descriptions
Stephan Baier, Yunpu Ma, Volker Tresp
Structured scene descriptions of images are useful for the automatic processing and querying of large image databases. We show how the combination of a semantic and a visual statis…
Mean values with cubic characters
Stephan Baier, Matthew P. Young
We investigate various mean value problems involving order three primitive Dirichlet characters. In particular, we obtain an asymptotic formula for the first moment of central valu…
Variance of primes in short residue classes for function fields
Stephan Baier, Arkaprava Bhandari
Keating and Rudnick derived asymptotic formulas for the variances of primes in arithmetic progressions and short intervals in the function field setting. Here we consider the hybri…
Large Sieve Inequalities for Characters to Powerful Moduli
Stephan Baier, Liangyi Zhao
In this paper we aim to generalize the results in Baier and Zhao and develop a general formula for large sieve with characters to powerful moduli that will be an improvement to the…
A Remark on the Conjectures of Lang-Trotter and Sato-Tate on Average
Stephan Baier
We obtain new average results on the conjectures of Lang-Trotter and Sato-Tate about elliptic curves.
The Sato-Tate Conjecture on Average for Small Angles
Stephan Baier, Liangyi Zhao
We obtain average results on the Sato-Tate conjecture for elliptic curves for small angles.
Diophantine approximation on lines in \mathbb{C}^2 with Gaussian prime constraints - enhanced version
Stephan Baier
We study the problem of Diophantine approximation on lines in with numerators and denominators restricted to Gaussian primes. To this end, we develop analogs of well…
Dimensions of Ext-groups of Weyl modules for GL_2
Stephan Baier, Sergey Lamzin, Vanessa Miemietz
Let F be an algebraically closed field of positive characteristic p. The third author and Will Turner gave an explicit description of the extension algebra of Weyl modules for GL_2…
Diophantine approximation with primes from short intervals
Stephan Baier, Sayantan Roy
In this paper, we establish hybrid results on Diophantine approximation with primes from short intervals. In particular, we prove the following result in a slightly modified form:…
Diophantine approximation with prime restriction in function fields
Stephan Baier, Esrafil Ali Molla, with an appendix by Arijit Ganguly
In the thirties of the last century, I. M. Vinogradov established uniform distribution modulo 1 of the sequence when is a fixed irrational real number and runs over…
On the large sieve with square moduli
Stephan Baier
We prove an estimate for the large sieve with square moduli which improves a recent result of L. Zhao. Our method uses an idea of D. Wolke and some results from Fourier analysis.
The large sieve with sparse sets of moduli
Stephan Baier
Extending a method of D. Wolke, we establish a general result on the large sieve with sparse sets S of moduli which are in a sense well-distributed in arithmetic progressions. We t…
A Lower Bound for the Large Sieve with Square Moduli
Stephan Baier, Sean B. Lynch, Liangyi Zhao
We prove a lower bound for the large sieve with square moduli.
The Lang-Trotter Conjecture on Average
Stephan Baier
For an elliptic curve over $\ratq$ and an integer let be the number of primes of good reduction such that the trace of the Frobenius morphism of $E/\fi…
The large sieve with power moduli for
Stephan Baier, Arpit Bansal
We establish a large sieve inequality for power moduli in , extending earlier work by L. Zhao and the first-named author on the large sieve for power moduli for the…
An uncountable subring of with Hausdorff dimension zero
Stephan Baier, Shameek Paul
We construct a subring as mentioned in the title (hence this subring has Lebesgue measure zero).
On Primes Represented by Quadratic Polynomials
Stephan Baier, Liangyi Zhao
This is a survey article on the Hardy-Littlewood conjecture about primes in quadratic progressions. We recount the history and quote some results approximating this hitherto unreso…
On the large sieve with sparse sets of moduli
Stephan Baier
Extending a method of D. Wolke, we establish a general result on the large sieve with sparse sets S of moduli which are in a sense well-distributed in arithmetic progressions. We t…
A Bombieri-Vinogradov theorem for sectors in real quadratic number fields
Stephan Baier, Esrafil Ali Molla
We establish a Bombieri-Vinogradov theorem for sectors in real quadratic number fields.
Multiple exponential sums and their applications to quadratic congruences
Nilanjan Bag, Stephan Baier, Anup Haldar
In this paper, we develop a method of evaluating general exponential sums with rational amplitude functions for multiple variables which complements works by T. Cochrane and Z. Zhe…
Improving Information Extraction from Images with Learned Semantic Models
Stephan Baier, Yunpu Ma, Volker Tresp
Many applications require an understanding of an image that goes beyond the simple detection and classification of its objects. In particular, a great deal of semantic information…
On the Low-lying zeros of Hasse-Weil L-functions for Elliptic Curves
Stephan Baier, Liangyi Zhao
In this paper, we obtain an unconditional density theorem concerning the low-lying zeros of Hasse-Weil L-functions for a family of elliptic curves. From this together with the Riem…
Conformance checking: A state-of-the-art literature review
Sebastian Dunzer, Matthias Stierle, Martin Matzner +1
Conformance checking is a set of process mining functions that compare process instances with a given process model. It identifies deviations between the process instances' actual…
Solutions of with small
Stephan Baier
Friedlander and Iwaniec investigated integral solutions of the equation , where is square-free and satisfies the congruence condition $D\eq…
Solving -adic polynomial equations using Jarratt's Method
Stephan Baier, Swarup Kumar Das, Saayan Mukherjee
We implement an iterative numerical method to solve polynomial equations in the -adic numbers, where . This method is a simplified -adic ana…
Large sieve inequalities with power moduli and Waring's problem
Stephan Baier, Sean B. Lynch
We improve the large sieve inequality with th-power moduli, for all . Our method relates these inequalities to a restricted variant of Waring's problem. Firstly, we inpu…
Large sieve with sparse sets of moduli for
Stephan Baier, Arpit Bansal
We establish a general large sieve inequality with sparse sets of moduli in the Gaussian integers which are in a sense well-distributed in arithmetic progressions. Th…
Multiplicative inverses in short intervals
Stephan Baier
We give an alternative proof of a recent result by T.D. Browning and A. Haynes (arXiv:1204.6374v1) on multiplicative inverses in sequences of intervals and improve this result unde…
Upper bounds for shifted moments of Dirichlet -functions to a fixed modulus over function fields
Stephan Baier, Peng Gao
In this paper, we establish sharp upper bounds on shifted moments of the family of Dirichlet -functions to a fixed modulus over function fields. We apply the result to obtain up…
On certain bilinear sums with modular square roots and applications
Stephan Baier
We extend bounds on additive energies of modular square roots by Dunn, Kerr, Shparlinski, Shkredov and Zaharescu and apply these results to obtain bounds on certain bilinear expone…
A note on Diophantine approximation with Gaussian primes
Stephan Baier
We investigate the distribution of modulo 1, where is a complex number which is not contained in , and runs over the Gaussian primes.
Exponential sums with Dirichlet coefficients of L-functions
Stephan Baier
Improving and extending recent results of the author, we conditionally estimate exponential sums with Dirichlet coefficients of L-functions, both over all integers and over all pri…
Small Pythagorean triples modulo prime powers
Stephan Baier, Anup Haldar
Let be a fixed prime. We obtain an asymptotic formula related to small solutions of quadratic congruences of the form where $\max\{|x_1|,|…
On Hecke Eigenvalues at Piatetski-Shapiro Primes
Stephan Baier, Liangyi Zhao
Let be the normalized n-th Fourier coefficient of a holomorphic cusp form for the full modular group. We show that for some constant depending on the cusp form and…
On bilinear sums with modular square roots and applications II
Stephan Baier
In this article, we continue our recent investigations on bilinear sums and additive energies with modular square roots. Here we improve our recent results for the case when the ra…
Analyzing Customer Feedback for Product Fit Prediction
Stephan Baier
One of the biggest hurdles for customers when purchasing fashion online, is the difficulty of finding products with the right fit. In order to provide a better online shopping expe…
Small solutions to inhomogeneous and homogeneous quadratic congruences modulo prime powers
Stephan Baier, Arkaprava Bhandari, Anup Haldar
We prove asymptotic formulae for small weighted solutions of quadratic congruences of the form , where is a fixed odd prim…
A note on the gaps between zeros of Epstein's zeta-functions on the critical line
Stephan Baier, Srinivas Kotyada, Usha Keshav Sangale
It is proved that Epstein's zeta-function , related to a positive definite integral binary quadratic form, has a zero with $ T \leq γ\leq T + T^{{3/7} +\var…
A Subconvexity Bound for Automorphic -functions for
Stephan Baier, Liangyi Zhao
In this paper, we develop a conditional subconvexity bound for Godement-Jacquet -functions associated with Maass forms for .
A note on the distribution of prime ideals in real quadratic fields
Stephan Baier, Sayantan Roy
In this note, we give a summary of the article ``The distribution of prime ideals of imaginary quadratic fields'' by G. Harman, A. Kumchev and P. A. Lewis and establish analogous r…
The large sieve for square moduli, revisited
Stephan Baier
We revisit the large sieve for square moduli and obtain conditional improvements under hypotheses on higher additive energies of modular square roots.
On the problem
Stephan Baier
We deal with the distribution of the fractional parts of , running over the prime numbers and being a fixed real number lying in the interval . Roughly speaki…
Automorphisms with exotic orbit growth
Stephan Baier, Sawian Jaidee, Shaun Stevens +1
We exhibit continua on two different growth scales in the dynamical Mertens' theorem for ergodic automorphisms of one-dimensional solenoids.
Restricted simultaneous Diophantine approximation
Stephan Baier, Anish Ghosh
We study the problem of Diophantine approximation on lines in under certain primality restrictions.
Diophantine approximation with sums of two squares II
Stephan Baier, Habibur Rahaman
Recently, the authors showed that for every irrational number , there exist infinitely many positive integers represented by any given positive definite binary quadratic fo…
Prime powers dividing products of consecutive integer values of
Stephan Baier, Pallab Kanti Dey
Let be a positive integer and . In this paper, we study orders of primes dividing products of the form . We prove that if $m >…
A refined version of the Lang-Trotter Conjecture
Stephan Baier, Nathan Jones
Let be an elliptic curve defined over the rational numbers and a fixed integer. Using a probabilistic model consistent with the Chebotarev theorem for the division fields o…
The large sieve inequality with square moduli for quadratic extensions of function fields
Stephan Baier, Rajneesh Kumar Singh
In this paper, we establish a version of the large sieve with square moduli for imaginary quadratic extensions of rational function fields of odd characteristics.
Type-Constrained Representation Learning in Knowledge Graphs
Denis KrompaÃ, Stephan Baier, Volker Tresp
Large knowledge graphs increasingly add value to various applications that require machines to recognize and understand queries and their semantics, as in search or question answer…
On the distribution of modulo one in imaginary quadratic number fields with class number one
Stephan Baier, Marc Technau
We investigate the distribution of modulo one in imaginary quadratic number fields with class number one, where is restricted to prime eleme…
On Hecke eigenvalues at primes of the form
Stephan Baier, Liangyi Zhao
In this paper, we study the average of the Fourier coefficients of a holomorphic cusp form for the full modular group at primes of the form .
On the distribution of modulo one in quadratic number fields
Stephan Baier, Dwaipayan Mazumder, Marc Technau
We investigate the distribution of modulo one in quadratic number fields with class number one, where is restricted to prime elements in the ring of integers…
Exponential sums with coefficients of certain Dirichlet series
Stephan Baier
Under the generalized Lindelöf Hypothesis in the t- and q-aspects, we bound exponential sums with coefficients of Dirichlet series belonging to a certain class. We use these estim…
Partial progress towards the large sieve for square moduli
Stephan Baier
This paper condenses and expands upon our recent contributions arXiv:2603.00768 and arXiv:2603.25814, which belong together, producing a single streamlined manuscript. We have adde…
A Polya-Vinogradov-type inequality on
Stephan Baier
We establish a Polya-Vinogradov-type bound for finite periodic multipicative characters on the Gaussian integers.
Small solutions of ternary quadratic congruences with averaging over the moduli
Stephan Baier, Aishik Chattopadhyay
In a recent paper, we proved that for any large enough odd modulus and fixed coprime to , the congruence \[ x_1^2+α_2x_2^2+α_3x_3^2\equi…
Diophantine Approximation with Piatetski-Shapiro Primes
Stephan Baier, Habibur Rahaman
We prove that for every irrational number , real number , real number satisfying and positive real number satisfying , there exist infinit…
Diophantine approximation with prime denominator in real quadratic function fields
Stephan Baier, Esrafil Ali Molla
In the thirties of the last century, I. M. Vinogradov proved that the inequality has infinitely prime solutions , where denotes the dis…
Diophantine approximation with prime denominator in quadratic number fields under GRH
Stephan Baier, Sourav Das, Esrafil Ali Molla
Matomäki proved that if is irrational, then there are infinitely many primes such that for a suitable integer a. In this…
Applications of the square sieve to a conjecture of Lang and Trotter for a pair of elliptic curves over the rationals
Stephan Baier, Vijay M. Patankar
Let be an elliptic curve over . Let be a prime of good reduction for . Then, for a prime , the Frobenius automorphism associated to (unique…
Bombieri-Vinogradov Type Theorem for Sparse Sets of Moduli
Stephan Baier, Liangyi Zhao
In this paper, we establish theorems of Bombieri-Vinogradov type and Barban-Davenport-Halberstam type for sparse sets of moduli. As an application, we prove that there exist infini…
Addendum to "On the problem"
Stephan Baier
We prove that the conditions and in Theorems 3 and 4 of our recent paper "On the problem" can be omitted.
Attention-based Information Fusion using Multi-Encoder-Decoder Recurrent Neural Networks
Stephan Baier, Sigurd Spieckermann, Volker Tresp
With the rising number of interconnected devices and sensors, modeling distributed sensor networks is of increasing interest. Recurrent neural networks (RNN) are considered particu…
Asymptotic behavior of small solutions of quadratic congruences in three variables modulo prime powers
Stephan Baier, Anup Haldar
Let be a fixed prime and assume that are coprime to . We study the asymptotic behavior of small solutions of congruences of the form $α_1x_1^2+α_2x_2^2+…
On Primes in Quadratic Progressions
Stephan Baier, Liangyi Zhao
We verify the Hardy-Littlewood conjecture on primes in quadratic progressions on average. The results in the present paper significantly improve those of a previous paper of the au…
A Bombieri-Vinogradov-type theorem with prime power moduli
Stephan Baier, Sudhir Pujahari
In 2020, Roger Baker \cite{Bak} proved a result on the exceptional set of moduli in the prime number theorem for arithmetic progressions of the following kind. Let be…
A Bombieri-Vinogradov-type theorem for moduli with small radical
Stephan Baier, Sudhir Pujahari
In this article, we extend our recent work on a Bombieri-Vinogradov-type theorem for sparse sets of prime powers with to sparse sets…
A lower bound for classical Kloosterman sums and an application
Stephan Baier, Jishu Das, Jewel Mahajan
We present a lower bound for the classical Kloosterman sum where and is an odd integer. We apply this lower bound for Kloosterman sums to derive an explic…
Divisibility problems for function fields
Stephan Baier, Arpit Bansal, Rajneesh Kumar Singh
We investigate three combinatorial problems considered by Erdös, Rivat, Sarközy and Schön regarding divisibility properties of sum sets and sets of shifted products of integers…
Elliptic curves with square-free
Stephan Baier
Under the Riemann Hypothesis for Dirichlet L-functions, we improve on the error term in a smoothed version of an estimate for the density of elliptic curves with square-free $Î=D/…
Character sums to prime power moduli evaluated at binary quadratic forms
Stephan Baier, Aishik Chattopadhyay
We establish estimates for short character sums to prime power moduli evaluated at binary quadratic forms. This complements estimates established by Heath-Brown for such character…
Predicting the Co-Evolution of Event and Knowledge Graphs
Cristóbal Esteban, Volker Tresp, Yinchong Yang +2
Embedding learning, a.k.a. representation learning, has been shown to be able to model large-scale semantic knowledge graphs. A key concept is a mapping of the knowledge graph to a…
Small Solutions of generic ternary quadratic congruences
Stephan Baier, Aishik Chattopadhyay
We consider small solutions of quadratic congruences of the form , where is an odd prime power. Here, is arbitrary but fi…
On bilinear sums with modular square roots and applications III
Stephan Baier
We continue our investigations of bilinear sums with modular square roots and the large sieve for square moduli in our recent article "On bilinear sums with modular square roots an…
The large sieve with square norm moduli in Z[i]
Stephan Baier
We prove a large sieve inequality for square norm moduli in Z[i].
Diophantine approximation on lines with prime constraints
Stephan Baier, Anish Ghosh
We study the problem of Diophantine approximation on lines in R^2 with prime numerator and denominator.
Small solutions of generic ternary quadratic congruences to general moduli
Stephan Baier, Aishik Chattopadhyay
We study small non-trivial solutions of quadratic congruences of the form , with being an odd natural number, in an average sense. T…
Diophantine approximation on lines in with Gaussian prime constraints
Stephan Baier
We study the problem of Diophantine approximation on lines in with numerators and denominators restricted to Gaussian primes.
Moments of the error term in the Sato-Tate law for elliptic curves
Stephan Baier, Neha Prabhu
We derive new bounds for moments of the error in the Sato-Tate law over families of elliptic curves. Our estimates are stronger than those obtained by W.D. Banks and I.E. Shparlins…
The large sieve for square moduli in function fields
Stephan Baier, Rajneesh Kumar Singh
We prove a lower and an upper bound for the large sieve with square moduli for function fields. These bounds correspond to bounds for the classical large sieve with square moduli e…
Primes in Quadratic Progressions on Average
Stephan Baier, Liangyi Zhao
In this paper, we establish a theorem on the distribution of primes in quadratic progressions on average.
Quantitative Oppenheim Conjecture for Quadratic Forms in 5 Variables over Function Fields
Stephan Baier, Arkaprava Bhandari
We translate Davenport's and Heilbronn's work on a quantitative version of the Oppenheim conjecture for indefinite diagonal quadratic forms in 5 variables into the setting of funct…
Diophantine Approximation with Prime Restriction in Real Quadratic Number Fields
Stephan Baier, Dwaipayan Mazumder
The distribution of modulo one, where runs over the rational primes and is a fixed irrational real, has received a lot of attention. It is natural to ask for which e…
Diophantine approximation with sums of two squares
Stephan Baier, Habibur Rahaman
For any given positive definite binary quadratic form with integer coefficients, we establish two results on Diophantine approximation with integers represented by . Firstly…
Large sieve inequality with power moduli for function fields
Stephan Baier, Rajneesh Kumar Singh
In this paper, we establish a general version of the large sieve with additive characters for restricted sets of moduli in arbitrary dimension for function fields. From this, we de…
Central limit theorems for elliptic curves and modular forms with smooth weight functions
Stephan Baier, Neha Prabhu, Kaneenika Sinha
The second and third-named authors (arXiv:1705.04115) established a Central Limit Theorem for the error term in the Sato-Tate law for families of modular forms. This method was ada…