Finite element methods: approximation and calculation

The resolution of complex partial differential equations (PDEs), which are ubiquitous in various scientific and technical fields, today relies predominantly on advanced numerical methods. Among these, the finite element method stands out as an essential pillar of modern numerical analysis. It enables the understanding and solving of problems that once seemed inaccessible, particularly in the … Read more

The geometry of Kähler varieties: complex and metric

Kählerian varieties establish themselves as an essential pillar of modern geometry, uniquely combining complex, metric, and symplectic structures. Their applications transcend mathematical boundaries, fueling advances in topology, theoretical physics, and complex algebraic geometry. Each instance of a Kählerian variety illustrates a subtle balance between geometric rigidity and analytical flexibility, conditioned by profound properties such as … Read more

The numerical analysis of PDEs: schemes and convergence

At the beginning of this decade, a deep understanding of partial differential equations (PDEs) occupies a crucial place in scientific and technological advancements. Numerical analysis plays a key role in the practical resolution of these complex equations, which model various natural and industrial phenomena, such as diffusion, fluid mechanics, or thermal transfer. The use of … Read more

The theory of modular functions: automorphic forms

In the modern mathematical landscape, the study of modular functions and automorphic forms constitutes a crucial field intertwining complex analysis, number theory, and arithmetic geometry. The theory of modular functions lies at the heart of a vast network of concepts where notions of moduli space, discrete groups related to the modular group, and the famous … Read more

Sensitivity analysis: perturbations and stability

In a universe where mathematical models and simulations shape strategic decision-making, sensitivity analysis emerges as an essential method. In the face of the inevitable uncertainties of input data, this technique reveals the impact of variations in parameters on final outcomes, thereby ensuring the robustness of the studied systems. The ability to detect sensitive areas of … Read more

The geometry of Hilbert spaces: infinite-dimensional geometry

The geometry of Hilbert spaces represents a revolution in the way we understand mathematics and physics. It opens the door to a deeper understanding of infinite structures and allows us to explore phenomena that are sometimes counter-intuitive related to infinite dimensions. The complexity of this infinite-dimensional geometry is revealed through fundamental concepts such as the … Read more

Discrete optimization: algorithms and complexity

In the contemporary landscape of operations research, discrete optimization stands out as a fundamental pillar for solving complex decision-making problems involving finite and integer variables. This branch of applied mathematics, at the crossroads of linear programming and combinatorics, offers engineers and researchers innovative tools to improve the efficiency of systems across multiple fields, ranging from … Read more

The theory of Diophantine approximations: rationals and irrationals

The theory of Diophantine approximations stands out as a major pillar in the fine understanding of the relationships between real numbers and rational numbers. It extends its reach from simple fractions to the most complex irrationals, offering powerful tools to approach numbers that, at first glance, seem inaccessible through fractions. In 2025, this branch of … Read more

Time Series Analysis: Models and Forecasts

In brief Understanding time series: Definitions and stakes of chronological analysis Time series constitute an ordered set of chronological data recorded at regular intervals, reflecting the evolution of a phenomenon over time. The analysis of these series aims to extract recurring patterns, lasting trends, and seasonal cycles to better grasp the underlying dynamics. These data, … Read more

Fixed point methods: existence and uniqueness

At the heart of functional analysis, fixed-point methods hold a fundamental place due to their ability to guarantee not only the existence but also the uniqueness of solutions to many complex mathematical problems. These techniques are based on the principle that a function, under certain conditions, possesses a fixed point, that is, a point where … Read more