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Modular Graph Functions [PDF]

open access: yesCommunications in Number Theory and Physics, 2016
In earlier work we studied features of non-holomorphic modular functions associated with Feynman graphs for a conformal scalar field theory on a two-dimensional torus with zero external momenta at all vertices.
D'Hoker, Eric   +3 more
core   +5 more sources

Lessons from the Ramond sector [PDF]

open access: yesSciPost Physics, 2020
We revisit the consistency of torus partition functions in (1+1)$d$ fermionic conformal field theories, combining traditional ingredients of modular invariance/covariance with a modernized understanding of bosonization/fermionization dualities.
Nathan Benjamin, Ying-Hsuan Lin
doaj   +5 more sources

Modular Equations and Distortion Functions [PDF]

open access: yesThe Ramanujan Journal, 2007
Modular equations occur in number theory, but it is less known that such equations also occur in the study of deformation properties of quasiconformal mappings.
B.C. Berndt   +45 more
core   +4 more sources

Modular Hamiltonians of excited states, OPE blocks and emergent bulk fields

open access: yesJournal of High Energy Physics, 2018
We study the entanglement entropy and the modular Hamiltonian of slightly excited states reduced to a ball shaped region in generic conformal field theories.
Gábor Sárosi, Tomonori Ugajin
doaj   +3 more sources

Robust H Loop Shaping Controller Synthesis for SISO Systems by Complex Modular Functions

open access: yesMathematical and Computational Applications, 2021
In this paper, a loop shaping controller design methodology for single input and a single output (SISO) system is proposed. The theoretical background for this approach is based on complex elliptic functions which allow a flexible design of a SISO ...
Ahmad Taher Azar   +2 more
doaj   +1 more source

Class fields generated by coordinates of elliptic curves

open access: yesOpen Mathematics, 2022
Let KK be an imaginary quadratic field different from Q(−1){\mathbb{Q}}\left(\sqrt{-1}) and Q(−3){\mathbb{Q}}\left(\sqrt{-3}). For a nontrivial integral ideal m{\mathfrak{m}} of KK, let Km{K}_{{\mathfrak{m}}} be the ray class field modulo m{\mathfrak{m}}.
Jung Ho Yun, Koo Ja Kyung, Shin Dong Hwa
doaj   +1 more source

Synergistic Structure in the Speed Dependent Modulation of Muscle Activity in Human Walking. [PDF]

open access: yesPLoS ONE, 2016
Recently, a modular organisation has been proposed to simplify control of the large number of muscles involved in human walking. Although previous research indicates that a single set of modular activation patterns can account for muscle activity at ...
Tom J W Buurke   +3 more
doaj   +1 more source

On the modularity of certain functions from the Gromov–Witten theory of elliptic orbifolds [PDF]

open access: yesRoyal Society Open Science, 2015
In this paper, we study modularity of several functions which naturally arose in a recent paper of Lau and Zhou on open Gromov–Witten potentials of elliptic orbifolds.
Kathrin Bringmann   +2 more
doaj   +1 more source

On some extensions of Gauss’ work and applications

open access: yesOpen Mathematics, 2020
Let K be an imaginary quadratic field of discriminant dK{d}_{K} with ring of integers OK{{\mathcal{O}}}_{K}, and let τK{\tau }_{K} be an element of the complex upper half plane so that OK=[τK,1]{{\mathcal{O}}}_{K}={[}{\tau }_{K},1].
Jung Ho Yun, Koo Ja Kyung, Shin Dong Hwa
doaj   +1 more source

Poincaré series for modular graph forms at depth two. Part II. Iterated integrals of cusp forms

open access: yesJournal of High Energy Physics, 2022
We continue the analysis of modular invariant functions, subject to inhomogeneous Laplace eigenvalue equations, that were determined in terms of Poincaré series in a companion paper. The source term of the Laplace equation is a product of (derivatives of)
Daniele Dorigoni   +2 more
doaj   +1 more source

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