Solution Method#
Ordinary Least Squares (OLS) Regression#
Formulation of the Problem
Objective Function
Expanding the Objective Function
Finding the Minimum
Solving for \( \boldsymbol{\beta} \)
Solution Summary
Additional Considerations
Example
Least Mean Squares (LMS) and Recursive Least Squares (RLS) Algorithms#
Formulation of the Problem
Objective Function
Gradient Descent Approach
Convergence Analysis
Variants of LMS
Kalman Filter#
Formulation of the Problem
State Space Model
Prediction Step
Update Step
Convergence and Stability
Proximal Mapping: A Comprehensive Overview#
Proximal Operator Definition
Proximal Operator for \( g(x) = \lambda |x| \)
Interpretation
Proximal Operator for the Zero Function \( g(x) \equiv 0 \)
Conclusion