Bertuel Tangue Ndawa

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20212026

most citedCherry Maps with Different Critical Exponents: Bifurcation of Geometry

2 citations · 2 across the 12 of their papers we have counts for

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math.DS2026

Diffeomorphism Group Actions on Para-Kähler Structures: Lifts and Induced Dynamics on 3-Webs

Bertuel Tangue Ndawa, Ferdinand Ngakeu, Nasser Saipele Nansidi +1

Let $M$ be a smooth manifold equipped with a para-Kähler structure. We define an action of the diffeomorphism group $Diff (M)$ on the space of para-Kähler structures…

math.DS2026

Generic three-parameter unfolding of a completely degenerate germ of a vector field on $R^{3}$

Samuel Diangitukulu Ndimba, Aimable Sayinzoga, Bertuel Tangue Ndawa +2

In this work, we analyze a completely degenerate germ of a real vector field at the origin of $R^{3}$ . We construct a generic three-parameter unfolding of this germ and iden…

math.DS2026

Factorization of Isomorphisms of $(H, θ)$ -twisted Lie algebroids

Nasser Saipele nansidi, Bertuel Tangue Ndawa, Luc Emery Diekouam Fotso +2

We study the isomorphism groupoid $T (M)$ of $θ$ -almost twisted Poisson ( $θ$ -atP) structures on a smooth manifold $M$ , focusing on the internal structure of its morphisms.…

math.DS2026

Bi-Lagrangian and transverse Dirac structures induced on the Whitney sum

Bertuel Tangue Ndawa, Ferdinand Ngakeu, Nasser Saipele Nansidi

Let $(M, ω, F_{1}, F_{2})$ be a bi-Lagrangian manifold. For a distribution $D \subseteq T M$ , we characterize when the subbundle $N^{*t}\mathcal{D}:=\mathcal{D…

math.DS2025

On the geometric quantization of $θ$ -almost twisted Poisson manifold

Nasser Saipele Nansidi, Bertuel Tangue Ndawa, Joseph Dongho

We introduce and investigate the concept of a $θ$ -almost twisted Poisson manifold $(M, Λ, φ, θ)$ . This structure consists of a smooth manifold $M$ equipped with a bivector field $Λ$ ,…

math.DS2025

Dynamics on Bi-Lagrangian Structures and Cherry maps

Bertuel Tangue Ndawa

We consider a bi-Lagrangian structure $(ω, F_{1}, F_{2})$ on a manifold $M$ ; that is, $(M, ω, F_{1}, F_{2})$ is a bi-Lagrangian manifold. We prolong bi-L…

math.DS2024

$C^{1}$ -Diffeomorphism Class of some Circle Maps with a Flat Interval

Bertuel Tangue Ndawa, Carlos Ogouyandjou

We study a certain class circle maps which are constant on one interval (called flat piece), and such that the degrees of the singularities at the boundary of the flat piece are di…

math.DS2022

Dynamic of Pair of some Distributions: Bi-lagrangian structure and its prolongations on the (co)tangent bundles, and Cherry flow

Bertuel Tangue Ndawa

We consider a bi-Lagrangian manifold $(M, ω, F_{1}, F_{2})$ . That is, $ω$ is a 2-form, closed and non-degenerate (called symplectic form) on $M$ , and $(\mathcal{F}…

math.DS2021★ 2 cited

Cherry Maps with Different Critical Exponents: Bifurcation of Geometry

Bertuel Tangue Ndawa

We consider order preserving $C^{3}$ circle maps with a flat piece, irrational rotation number and critical exponents $(ℓ_{1}, ℓ_{2})$ . We detect a change in the geometry of the sy…

math.DS2021

Infinite Lifting of an Action of Symplectomorphism Group on the set of Bi-Lagrangian Structures

Bertuel Tangue Ndawa

$(ω, F_{1}, F_{2})$ , where $ω$ is symplectic and $(F_{1}, F_{2})$ is a pair of transversal Lagrangian foliations. Such structures admit a natur…

math.DS2021

Rigidity of Fibonacci Circle Maps with a Flat Piece and Different Critical Exponents

Bertuel Tangue Ndawa

We consider order preserving $C^{3}$ circle maps with a flat piece, Fibonacci rotation number, critical exponents $(ℓ_{1}, ℓ_{2})$ and negative shwarzian derivative. This paper tre…

Diffeomorphism Group Actions on Para-Kähler Structures: Lifts and Induced Dynamics on 3-Webs

Generic three-parameter unfolding of a completely degenerate germ of a vector field on R3

Factorization of Isomorphisms of (H,θ)-twisted Lie algebroids

Bi-Lagrangian and transverse Dirac structures induced on the Whitney sum

On the geometric quantization of θ-almost twisted Poisson manifold

Dynamics on Bi-Lagrangian Structures and Cherry maps

C1-Diffeomorphism Class of some Circle Maps with a Flat Interval

Dynamic of Pair of some Distributions: Bi-lagrangian structure and its prolongations on the (co)tangent bundles, and Cherry flow

Cherry Maps with Different Critical Exponents: Bifurcation of Geometry

Infinite Lifting of an Action of Symplectomorphism Group on the set of Bi-Lagrangian Structures

Rigidity of Fibonacci Circle Maps with a Flat Piece and Different Critical Exponents

Generic three-parameter unfolding of a completely degenerate germ of a vector field on $R^{3}$

Factorization of Isomorphisms of $(H, θ)$ -twisted Lie algebroids

On the geometric quantization of $θ$ -almost twisted Poisson manifold

$C^{1}$ -Diffeomorphism Class of some Circle Maps with a Flat Interval