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Algebraic and Geometric Methods in Coding Theory.

Sudhir GHORPADE

Summary:  The course covered the following topics: 

Linear Codes associated to higher dimensional varieties:

Geometric approach to linear codes via the language of projective systems. The following specific classes of linear codes and some of their fundamental properties including determination of basic parameters will be discussed. 

  • Codes associated to Veronese varieties (Projective Reed-Muller Codes)
  • Grassmann codes
  • Schubert codes

Betti numbers of linear codes and matroids: 

Fri. 26 Jan, 2024 → Wed. 07 Feb, 2024

Numbers Theory

Francesco Pappalardi

Summary:

Elementary Numbers Theory: 

  • Quadratic reciprocity
  • Arithmetic fonctions 

Analytic Numbers Theory : 

  • Dirichlet Arithmetic progression
  • Prime Number Theorem
Sun. 20 Apr, 2025 → Wed. 30 Apr, 2025

Integrable systems

Maciej Dunajski

Summary: Integrable systems are nonlinear differential equations which ‘in principle’ can be solved analytically. This means that the solution can be reduced to a finite number of algebraic operations and integrations. Such systems are very rare - most nonlinear differential equations admit chaotic behaviour and no explicit solutions can be written down. Integrable systems nevertheless lead to a very interesting mathematics ranging from differential geometry and complex analysis to quantum field theory and fluid dynamics.

Sun. 20 Apr, 2025 → Sun. 27 Apr, 2025

Theories of Ordinary Differential Equations (ODEs): Special Topics

Abdulhakeem Yusuf

Summary: The following topics were covered during the period of stay 

1. GENERAL FIRST-ORDER EQUATION i. General Introduction of ODE ii. iii. Equivalence of an Initial Value Problem Existence & Uniqueness Theorem 

2. LINEAR SYSTEM OF FIRST-ORDER EQUATION i. Characrerisation of the Fundamental Matrix ii. iii. iv. v. vi. vii. Properties of Linear Systems Adjoint systems Homogeneous and non-homogeneous system Autonomous Differential equations LINEAR SYSTEMS WITH PERIODIC COEFFICIENTS THEORY OF OSCILLATION 

Sun. 13 Apr, 2025 → Thu. 24 Apr, 2025

Algebraic curves over finite fields

Lecturer: Christophe RITZENTHALER

Abstract

This mini-course is a motivated introduction to the problematic of number of rational points on curves over finite fields. It will serve as a pretext to introduce the basics of algebraic geometry (Nullstellensatz, projective geometry,...) with a far-away open problem in mind (distribution of the number of points on genus 4 curves). We will in particular try to reduce the number of coefficients of these curves to be able to run some experiments with a computer.

Sat. 04 Oct, 2025 → Sat. 11 Oct, 2025