Serious Study Partner for Deep Learning Mathematics (Beyond the Basics) [D]

Hi everyone, I am looking for a study partner to dive deep into the mathematical foundations of Deep Learning. I have a solid grasp of the core concepts (architectures, backpropagation, etc.), but I want to bridge the gap by mastering the rigorous math behind them (Matrix Calculus, Probability Theory, Optimization, etc.). Who I’m looking for: Someone who already understands most Deep Learning concepts and has at least a foundational level of the associated math.