114 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of GhanaGH4 papers
- African Institute for Mathematical SciencesZA3 papers
- Université de Yaoundé ICM3 papers
- University of LiverpoolGB3 papers
- University of LoméTG3 papers
- École Polytechnique de ThièsSN2 papers
- Université Ouaga IIBF2 papers
- University of the WitwatersrandZA2 papers
- Airlangga UniversityID1 paper
- Aryabhatta Research Institute of Observational SciencesIN1 paper
- Austrian Academy of SciencesAT1 paper
- Brandenburg University of Technology Cottbus-SenftenbergDE1 paper
26 papers
Validation of satellite and reanalysis rainfall products against rain gauge observations in Ghana and Zambia
John Bagiliko, David Stern, Denis Ndanguza +1
Accurate rainfall data are crucial for effective climate services, especially in Sub-Saharan Africa, where agriculture depends heavily on rain-fed systems. The sparse distribution…
Hilbert space representation for quasi-Hermitian position-deformed Heisenberg algebra and Path integral formulation
Thomas Katsekpor, Latévi M. Lawson, Prince K. Osei +1
Position deformation of a Heisenberg algebra and Hilbert space representation of both maximal length and minimal momentum uncertainties may lead to loss of Hermiticity of some oper…
Density Analysis for coupled forward-backward SDEs with non-Lipschitz drifts and Applications
Rhoss Likibi Pellat, Olivier Menoukeu Pamen
We explore the existence of a continuous marginal law with respect to the Lebesgue measure for each component of the solution to coupled quadratic forward-backward stocha…
Smoothness of solutions of hyperbolic stochastic partial differential equations with -vector fields
Antoine-Marie Bogso, Moustapha Dieye, Olivier Menoukeu Pamen +1
In this paper we are interested in a quasi-linear hyperbolic stochastic differential equation (HSPDE) when the vector field is merely bounded and measurable. Although the determini…
Fractional Optimal Control Model of SARS-CoV-2 (COVID-19) Disease in Ghana
Samuel Okyere, Joseph Ackora-Prah, Kwaku Forkuoh Darkwah +2
Research focus on optimal control problems brought on by fractional differential equations has been extensively applied in practice. However, because they are still open-ended and…
Stochastic integration with respect to local time of the Brownian sheet and regularising properties of Brownian sheet paths
Antoine-Marie Bogso, Moustapha Dieye, Olivier Menoukeu Pamen
In this work, we generalise the stochastic local time space integration introduced in \cite{Ei00} to the case of Brownian sheet. %We develop a stochastic local time-space calculus…
Path-by-path uniqueness of multidimensional SDE's on the plane with nondecreasing coefficients
Antoine-Marie Bogso, Moustapha Dieye, Olivier Menoukeu-Pamen
In this paper we study path-by-path uniqueness for multidimensional stochastic differential equations driven by the Brownian sheet. We assume that the drift coefficient is unbounde…
Differential operators and reflection group of type
Ibrahim Nonkané, Latévi M. Lawson
In this note, we study the polynomial representation of the quantum Olshanetsky-Perelomov system for a finite reflection group of type . We endow the polynomial ring ${\ma…
Femtosecond laser inscriptions in Kerr nonlinear transparent media: dynamics in the presence of K-photon absorptions, radiative recombinations and electron diffusions
Emmanuel O. Akeweje, G. Bader, Alain M. Dikandé +1
Femtosecond lasers interacting with Kerr nonlinear optical materials, propagate in form of filaments due to the balance of beam diffraction by self-focusing induced by the Kerr non…
The damped harmonic oscillator at the classical limit of the Snyder-de Sitter space
Latévi Mohamed Lawson, Ibrahim Nonkané, Komi Sodoga
Valtancoli in his paper entitled [P. Valtancoli, Canonical transformations, and minimal length J. Math. Phys. 56, 122107 (2015)] has shown how the deformation of the canonical tran…
Simple close curve magnetization and application to Bellman's lost in the forest problem
Theophilus Agama
In this paper, we introduce and develop the notion of simple closed-curve magnetization. We provide an application to the Bellman lost in the forest problem by assuming special geo…
Position-dependent mass in strong quantum gravitational background fields
Latévi Mohamed Lawson
More recently, we have proposed a set of noncommutative space that describes the quantum gravity at the Planck scale [J. Phys. A: Math. Theor. 53, 115303 (2020)]. The interesting s…
Launching the VASCO citizen science project
Beatriz Villarroel, Kristiaan Pelckmans, Enrique Solano +25
The Vanishing & Appearing Sources during a Century of Observations (VASCO) project investigates astronomical surveys spanning a time interval of 70 years, searching for unusual and…
The prime index function
Theophilus Agama
In this paper we introduce the prime index function \begin{align}ι(n)=(-1)^{π(n)},\nonumber \end{align} where is the prime counting function. We study some elementary proper…
Cascaded V-Net using ROI masks for brain tumor segmentation
Adrià Casamitjana, Marcel Catà, Irina Sánchez +2
In this work we approach the brain tumor segmentation problem with a cascade of two CNNs inspired in the V-Net architecture \cite{VNet}, reformulating residual connections and maki…
Plane curves which are quantum homogeneous spaces
Ken Brown, Angela Tabiri
Let be a decomposable plane curve over an algebraically closed field of characteristic 0. That is, is defined in by an equation of the form $g…
Balanced matrices
Theophilus Agama, Gael Kibiti
In this paper, we introduce a particular class of matrices. We study the concept of a matrix to be \emph{balanced}. We study some properties of this concept in the context of matri…
Improved estimate for the prime counting function
Theophilus Agama
Using some simple combinatorial arguments, we establish some new estimates for the prime counting function and its allied functions. In particular we show that \begin{align}π(x)=Θ(…
Complete sets
Theophilus Agama
In this paper we introduce the concept of completeness of sets. We study this property on the set of integers. We examine how this property is preserved as we carry out various ope…
The diagonalization method and Brocard's problem
Theophilus Agama
In this paper, we introduce and develop the method of diagonalization of functions . We apply this method to show that the equations of the…
On a problem of Pillai with Fibonacci numbers and powers of 2
Mahadi Ddamulira, Florian Luca, Mihaja Rakotomalala
In this paper, we find all integers c having at least two representations as a difference between a Fibonacci number and a power of 2.
Fibonacci Numbers which are Products of two Pell Numbers
Mahadi Ddamulira, Florian Luca, Mihaja Rakotomalala
In this paper, we find all Fibonacci numbers which are products of two Pell numbers and all Pell numbers which are products of two Fibonacci numbers.
Difference equations and pseudo-differential operators on
Linda N. A. Botchway, P. Gaël Kibiti, Michael Ruzhansky
In this paper we develop the calculus of pseudo-differential operators on the lattice , which we can call pseudo-difference operators. An interesting feature of this…
Can chaos be observed in quantum gravity?
Bianca Dittrich, Philipp A. Hoehn, Tim A. Koslowski +1
Full general relativity is almost certainly 'chaotic'. We argue that this entails a notion of nonintegrability: a generic general relativistic model, at least when coupled to cosmo…