11/23/2024

Benoît Mandelbrot: Why Fractals and Power Laws Redefine Science and Economics

This 7-hour interview with Benoît Mandelbrot offers a captivating deep dive into his life, encompassing his childhood, upbringing, education, professional career, and groundbreaking research. It provides a thorough perspective on his unique approach to science, emphasizing the interconnectedness of various fields—mathematics, physics, economics, biology, finance, and more. Key insights I took away: Family Influence: Mandelbrot’s family played a critical role in nurturing his interest in mathematics and creating an environment for his intellectual development. Geometric Approach to Mathematics: He championed a visual, geometrical perspective over purely analytical methods. Mentorship and Collaboration: Mandelbrot’s interactions with intellectual giants such as Kolmogorov, Nabokov, Heisenberg, von Neumann, Gaston Maurice Julia, Paul Lévy, and Max Delbrück enriched his understanding across disciplines. Power-Law Distribution: While randomness in physics follows Gaussian distributions, Mandelbrot highlighted the dominance of power-law distributions in social sciences (e.g., Pareto income distribution, city sizes). Role of Private Sector: IBM provided Mandelbrot with the resources and freedom to pursue his groundbreaking work. Measuring Roughness and Fractals: Mandelbrot’s pioneering study of fractals revealed their significance in understanding patterns across multiple domains, including finance. Insights into Finance and Economics: He argued that finance and economics are fundamentally different from physics. Traditional Gaussian approaches to risk management fail to capture the realities of financial systems, which are better modeled using fractal geometry and power-law distributions. Some individuals truly stand apart, and Mandelbrot is one of those rare, extraordinary minds. Personal Takeaway For my own work in finance and economics, this interview reinforced the urgency of studying Mandelbrot’s approaches to risk and systems in depth. If you’re interested and willing to invest the time, I highly recommend watching this interview—it’s an inspiring exploration of a brilliant thinker’s journey. (text revised by LLM) "...Benoit B.[n 1] Mandelbrot[n 2] (20 November 1924 – 14 October 2010) was a Polish-born French-American mathematician and polymath with broad interests in the practical sciences, especially regarding what he labeled as "the art of roughness" of physical phenomena and "the uncontrolled element in life".[6][7][8] He referred to himself as a "fractalist"[9] and is recognized for his contribution to the field of fractal geometry, which included coining the word "fractal", as well as developing a theory of "roughness and self-similarity" in nature.[10] In 1936, at the age of 11, Mandelbrot and his family emigrated from Warsaw, Poland, to France. After World War II ended, Mandelbrot studied mathematics, graduating from universities in Paris and in the United States and receiving a master's degree in aeronautics from the California Institute of Technology. He spent most of his career in both the United States and France, having dual French and American citizenship. In 1958, he began a 35-year career at IBM, where he became an IBM Fellow, and periodically took leaves of absence to teach at Harvard University. At Harvard, following the publication of his study of U.S. commodity markets in relation to cotton futures, he taught economics and applied sciences. Because of his access to IBM's computers, Mandelbrot was one of the first to use computer graphics to create and display fractal geometric images, leading to his discovery of the Mandelbrot set in 1980. He showed how visual complexity can be created from simple rules. He said that things typically considered to be "rough", a "mess", or "chaotic", such as clouds or shorelines, actually had a "degree of order".[11] His math- and geometry-centered research included contributions to such fields as statistical physics, meteorology, hydrology, geomorphology, anatomy, taxonomy, neurology, linguistics, information technology, computer graphics, economics, geology, medicine, physical cosmology, engineering, chaos theory, econophysics, metallurgy, and the social sciences.[12] Toward the end of his career, he was Sterling Professor of Mathematical Sciences at Yale University, where he was the oldest professor in Yale's history to receive tenure.[13] Mandelbrot also held positions at the Pacific Northwest National Laboratory, Université Lille Nord de France, Institute for Advanced Study and Centre National de la Recherche Scientifique. During his career, he received over 15 honorary doctorates and served on many science journals, along with winning numerous awards. His autobiography, The Fractalist: Memoir of a Scientific Maverick, was published posthumously in 2012. ..." https://en.wikipedia.org/wiki/Benoit_Mandelbrot https://youtube.com/playlist?list=PLVV0r6CmEsFwl4HlrIKxKmdpBAGYJ9AbR&si=9_ccF1Tln7wRLTjy

- Pedro

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