Lectures related to Group extension

Covers extending domains, leading coefficients, and valid extensions.

Covers the extension and periodicity of Fourier series and the interpretation of coefficients.

Explores the extension property of spaces and the recognition principle for cofibrations.

Explores vibrations, their properties, and how any map can be transformed into a vibration through factorization.

Explores ramification and structure of finite extensions of Qp, including unramified extensions and Galois properties.

Explores cohomology and the cross product, demonstrating its application in group actions like conjugation.

Explores the long exact sequence of Ext-modules and their computations in homological algebra.

Explores the Galois theory of Qp, covering algebraic extensions, inertia groups, and cyclic properties.