Results 31 to 40 of about 10,632,527 (346)

Higher depth quantum modular forms, multiple Eichler integrals, and $$\mathfrak {sl}_3$$sl3 false theta functions [PDF]

open access: yesResearch in the Mathematical Sciences, 2017
We introduce and study higher depth quantum modular forms. We construct two families of examples coming from rank two false theta functions, whose “companions” in the lower half-plane can be also realized both as double Eichler integrals and as non ...
K. Bringmann, Jonas Kaszian, A. Milas
semanticscholar   +1 more source

Phase synchronized 6 Hz transcranial electric and magnetic stimulation boosts frontal theta activity and enhances working memory

open access: yesNeuroImage, 2021
Network-level synchronization of theta oscillations in the cerebral cortex is linked to many vital cognitive functions across daily life, such as executive functions or regulation of arousal and consciousness.
Tiam Hosseinian   +4 more
doaj   +1 more source

Opers and theta functions

open access: yesAdvances in Mathematics, 2004
We construct natural maps (the Klein and Wirtinger maps) from moduli spaces of vector bundles on an algebraic curve $X$ to affine spaces, as quotients of the nonabelian theta linear series. We prove a finiteness result for these maps over generalized Kummer varieties (moduli of torus bundles), leading us to conjecture that the maps are finite in ...
Ben-Zvi, David, Biswas, Indranil
openaire   +3 more sources

A Product of Theta-Functions Analogous to Ramanujan's Remarkable Product of Theta-Functions and Applications

open access: yesJournal of Mathematics, 2013
We define a product lk,n for any positive real numbers k and n involving Ramanujan's theta-functions ϕ(q) and ψ(q) which is analogous to Ramanujan's remarkable product of theta-functions recorded by Ramanujan (1957) and study its several properties.
Nipen Saikia
doaj   +1 more source

Effective Congruences for Mock Theta Functions

open access: yesMathematics, 2013
Let M(q) = ∑c(n) qn be one of Ramanujan’s mock theta functions. We establish the existence of infinitely many linear congruences of the form: c(An + B) ≡ 0 (mod lj) where A is a multiple of l and an auxiliary prime, p.
Heidi Goodson   +3 more
doaj   +1 more source

Discrete Gaussian Distributions via Theta Functions [PDF]

open access: yesSIAM Journal on applied algebra and geometry, 2018
We introduce a discrete analogue of the classical multivariate Gaussian distribution. It is parametrized by the Riemann theta function on the integer lattice.
Daniele Agostini, Carlos Améndola
semanticscholar   +1 more source

Eisenstein Series Identities Involving the Borweins' Cubic Theta Functions

open access: yesJournal of Applied Mathematics, 2012
Based on the theories of Ramanujan's elliptic functions and the (p, k)-parametrization of theta functions due to Alaca et al. (2006, 2007, 2006) we derive certain Eisenstein series identities involving the Borweins' cubic theta functions with the help of
Ernest X. W. Xia, Olivia X. M. Yao
doaj   +1 more source

Theta functions on varieties with effective anti-canonical class [PDF]

open access: yesMemoirs of the American Mathematical Society, 2016
We show that a large class of maximally degenerating families of n n -dimensional polarized varieties comes with a canonical basis of sections of powers of the ample line bundle.
M. Gross, P. Hacking, Bernd S Siebert
semanticscholar   +1 more source

Some theorems on the explicit evaluation of Ramanujan's theta-functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
Bruce C. Berndt et al. and Soon-Yi Kang have proved many of Ramanujan's formulas for the explicit evaluation of the Rogers-Ramanujan continued fraction and theta-functions in terms of Weber-Ramanujan class invariants.
Nayandeep Deka Baruah, P. Bhattacharyya
doaj   +1 more source

On Entry 8 of Chapter 19 of Ramanujan's Second Notebook [PDF]

open access: yesNotes on Number Theory and Discrete Mathematics
The aim of this paper is to give an alternative proof of Entry 8 of Chapter 19 of Ramanujan's Second Notebook. Further, we deduce certain modular equations of degree 5 as a consequence of Entry 8 of Chapter 19.
K. R. Vasuki, A. Darshan
doaj   +1 more source

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