Burau Representation of Braid Groups and q-Rationals

S Morier-Genoud, V Ovsienko… - International …, 2024 - academic.oup.com
We establish a link between the new theory of-deformed rational numbers and the classical
Burau representation of the braid group. We apply this link to the open problem of …

On radius of convergence of -deformed real numbers

L Leclere, S Morier-Genoud, V Ovsienko… - arXiv preprint arXiv …, 2021 - arxiv.org
We study analytic properties of``$ q $-deformed real numbers'', a notion recently introduced
by two of us. A $ q $-deformed positive real number is a power series with integer …

Thurston compactifications of spaces of stability conditions on curves

K Kikuta, N Koseki, G Ouchi - arXiv preprint arXiv:2211.08001, 2022 - arxiv.org
In this paper, we construct a compactification of the space of Bridgeland stability conditions
on a smooth projective curve, as an analogue of Thurston compactifications in Teichm\" uller …

On -deformed Farey sum and a homological interpretation of -deformed real quadratic irrational numbers

X Ren - arXiv preprint arXiv:2210.06056, 2022 - arxiv.org
The left and right $ q $-deformed rational numbers were introduced by Bapat, Becker and
Licata via regular continued fractions, and they gave a homological interpretation for left and …

Shadows of rationals and irrationals: supersymmetric continued fractions and the super modular group

CH Conley, V Ovsienko - Journal of Geometry and Physics, 2023 - Elsevier
This paper is an attempt to apply the tools of supergeometry to arithmetic. Supergeometric
objects are defined over supercommutative rings of coefficients. We consider an integral ring …

[HTML][HTML] Continued fractions for q-deformed real numbers,{− 1, 0, 1}-Hankel determinants, and Somos-Gale-Robinson sequences

V Ovsienko, E Pedon - Advances in Applied Mathematics, 2025 - Elsevier
Abstract q-deformed real numbers are power series with integer coefficients. We study
Stieltjes and Jacobi type continued fraction expansions of q-deformed real numbers and find …

On -deformed cubic equations: the quantum heptagon and nonagon

V Ovsienko, A Ustinov - arXiv preprint arXiv:2408.13670, 2024 - arxiv.org
The recent notion of $ q $-deformed irrational numbers is characterized by the invariance
with respect to the action of the modular group $\PSL (2,\Z) $, or equivalently under the …

Infinitesimal Modular Group: -Deformed and Witt Algebra

A Thomas - SIGMA. Symmetry, Integrability and Geometry: Methods …, 2024 - emis.de
We describe new $ q $-deformations of the 3-dimensional Heisenberg algebra, the simple
Lie algebra $\mathfrak {sl} _2 $ and the Witt algebra. They are constructed through a …

Quantum continuants, quantum rotundus and triangulations of annuli

L Leclere, S Morier-Genoud - arXiv preprint arXiv:2207.08906, 2022 - arxiv.org
We give enumerative interpretations of the polynomials arising as numerators and
denominators of the $ q $-deformed rational numbers introduced by Morier-Genoud and …

[PDF][PDF] Modular invariant q-deformed numbers: first steps

V Ovsienko - amathr.org
where q is a parameter, is commonly considered as a “quantum”, or a q-analogue of a
(positive) integer n. The expression goes back to Euler («1760) who used it in the context of …