Hi there! I am a *data scientist* based in Vienna, and this is my knowledge repository. I call it my *second brain*, as I organize what I study and read into a structure that aligns with my way of thinking. For me, learning is all about revisiting concepts, connecting ideas and keeping things fresh. My second brain helps me out on this. My areas of focus are *statistics*, *machine learning*, and *finance*. Feel free to connect with me here: <a href="https://github.com/bernhard-pfann" class="pill-button">GitHub</a> <a href="https://bernhard-pfann.medium.com" class="pill-button">Medium</a> <a href="https://www.linkedin.com/in/bernhard-pfann/" class="pill-button">LinkedIn</a> ## Recently Edited Notes | Note | Last Edited | | --------------------------------------------------------------------------------------------------------- | ----------- | | [[notes/Quant Finance/Variance Ratio Test.md\|Variance Ratio Test]] | 2025-04-11 | | [[notes/Probability/Exponential Distribution.md\|Exponential Distribution]] | 2025-04-11 | | [[notes/Calculus/Polynomial Approximation.md\|Polynomial Approximation]] | 2025-04-08 | | [[notes/Quant Finance/Vasicek Model.md\|Vasicek Model]] | 2025-04-07 | | [[notes/Quant Finance/Bond Pricing One Factor Model.md\|Bond Pricing One Factor Model]] | 2025-03-31 | | [[notes/Quant Finance/Black-Scholes PDE with Dynamic Hedging.md\|Black-Scholes PDE with Dynamic Hedging]] | 2025-03-18 | | [[notes/Quant Finance/Geometric Brownian Motion.md\|Geometric Brownian Motion]] | 2025-03-18 | | [[notes/Quant Finance/Itô Processes and Itô's Lemma.md\|Itô Processes and Itô's Lemma]] | 2025-03-18 |