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David H Bailey @math_scholar

I research mathematics, computer science, finance and the mysteries of the universe.

Joined April 2019
  • Tweets 75
  • Following 9
  • Followers 638
Photos and videos
Pi Day (March 14) is tomorrow! In honor of this blessed occasion, I have constructed a new crossword puzzle; this one implements a new design for a mathematical crossword, which to my knowledge has never before been employed. Happy solving! mathscholar.org/2023/03/pida…

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So soon? Yes, it is that time of year again — PiDay (March 14) is just a few days away. In honor of this mathematical holy day, I present once again a crossword puzzle with an appropriate pi-related theme, with a new design for a mathematical crossword. mathscholar.org/2023/03/pida…
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I have written a new article, "Major brokerages and news media feature technical analysis”. This lists material on technical analysis on the websites of major brokerages and news media. mathinvestor.org/2023/02/maj…
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I have written the article "Can ChatGPT compose math theorems?” It describes some of the startling advances of AI, in particular the new ChatGPT software, and provides some examples of its attempts to prove well-known mathematical theorems: mathscholar.org/2023/02/can-…
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I have written a new article for the Math Scholar blog: "Can ChatGPT prove math theorems?" It explores the new ChatGPT tool and assesses its skill at proving math theorems. mathscholar.org/2023/02/can-…
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I have written a new article for the Mathematical Investor blog: "Can factor investing become scientific?" It explores the deplorable lack of rigor in the "factor investment" field. mathinvestor.org/2023/01/can…

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I have just posted a new article to the Mathematical Investor blog: "How safe are cryptocurrency investments?". It summarizes many of recent failures and describes way to avoid problems: mathinvestor.org/2022/08/how…
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I have written a new article for the Math Scholar blog: "2022 Fields Medalists: Diverse backgrounds, breakthrough mathematics”. It describes the diverse backgrounds and accomplishments of these recipients. mathscholar.org/2022/07/2022…
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I have written a new article for the Math Scholar blog: "Where are the extraterrestrials? Fermi’s paradox, diversity and the origin of life”. It explains why most of the proposed solutions to Fermi's paradox do not work, and describes some new results. mathscholar.org/2022/03/wher…
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PiDay is just one week away, so I constructed a crossword puzzle for the occasion. This year's puzzle commemorates a well-known pi-related theorem, one of the most beautiful facts in mathematics, which was originally discovered in the 18th century. mathscholar.org/2022/03/pida…
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I have written a new article for the Math Scholar blog: "Latest experimental data compounds the Hubble constant discrepancy”, which discusses the nagging discrepancy between values of the Hubble constant obtained by different experimental approaches: mathscholar.org/2022/02/late…
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I have written a new article for the Mathematical Investor blog: "Backtest overfitting and the post-hoc probability fallacy”. It shows why backtest overfitting in finance can be seen as an instance of the post-hoc fallacy of probability theory: mathinvestor.org/2022/02/bac…
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Significance has published our paper (with @lopezdeprado ) on finance's replication crisis. Sloppy use of statistics too often yields designs and strategies that fail when actually fielded. rss.onlinelibrary.wiley.com/… Find a pre-print here: ssrn.com/abstract_id=3895330
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Significance has published our paper (with @lopezdeprado) on finance's replication crisis. We show that many of the strategies and investment funds in use today are based on statistical errors and shoddy use of backtest data. Here is a preprint: papers.ssrn.com/sol3/papers.…

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The American Mathematical Monthly has published a special issue, co-edited by Scott Chapman and myself, devoted to my colleague Jonathan Borwein, who passed away in 2016. I co-authored three of the articles in the issue, including a short introduction. tandfonline.com/toc/uamm20/1…

The American Mathematical Monthly

Special Issue in Memory of Jonathan Borwein. Volume 128, Issue 9 of The American Mathematical Monthly

tandfonline.com
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I have written a new article for the Math Scholar blog: "The brave new world of probability and statistics”. It highlights the many ways in which probability and statistics are misused in modern society: mathscholar.org/2021/11/the-…
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I have written a new article for the Math Scholar blog: "Computer theorem prover verifies sophisticated new result”. It describes some state-of-the-art research in computerized theorem provers and machine learning-based conjecture checkers. mathscholar.org/2021/07/comp…
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I have written a new article for the Mathematical Investor blog. It mentions those who promote astrology in financial markets, but warns that other practices, such as technical analysis, day trading, and forecasting, are equally unscientific. mathinvestor.org/2021/06/can…
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I have written a new article for the Math Scholar blog: “Bach as mathematician”. It explores how Bach was a master of syntax, structure and recursion, qualities that resonate with modern mathematics and computer science. mathscholar.org/2021/06/bach…
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I have written an article for the Math Scholar blog describing a new measurement of the magnetic moment of the muon that may draw into question the validity and/or completeness of standard model: mathscholar.org/2021/04/muon…
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