Monday, June 3, 2024

Riemannian Geometry Cheat sheet

Target audience: Beginner
Estimated reading time: 3'
A visual overview of Riemannian geometry for everyone.

Riemannian geometry is core component of geometric learning that tackles the challenges of high-dimensional, densely packed but limited data, and complex distributions. Riemannian geometry provides a solution by helping data scientists understand the true shape and distribution of data.


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Riemannian geometry provides data scientists with a mathematical framework facilitates the creation of models that are accurate and complex by leveraging geometric and topological insights.

References

Here is the list of published articles related to geometric learning:


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Patrick Nicolas has over 25 years of experience in software and data engineering, architecture design and end-to-end deployment and support with extensive knowledge in machine learning. 
He has been director of data engineering at Aideo Technologies since 2017 and he is the author of "Scala for Machine Learning", Packt Publishing ISBN 978-1-78712-238-3 
and Geometric Learning in Python Newsletter on LinkedIn.

Monday, May 13, 2024

Logistic Regression on Riemann Manifolds

Target audience: Advanced
Estimated reading time: 6'

Traditional linear models in machine learning, such as logistic regression, struggle to grasp the complex characteristics of data in very high dimensions. 
Symmetric Positive Definite manifolds improve the output quality of logistic regression by enhancing feature representation in a lower-dimensional space.



Table of Contents

        Logistic regression
        SPD manifolds
        Logarithmic map
        Setup
        Data generation
        Manifold creation
        Euclidean space
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What you will learn: How to implement and validate a binary logistic regression classifier on SPD manifolds using affine invariant and log Euclidean metrics.