 Copyright 20112017. All Rights Reserved.
Twitter Updates
 RT @johncarlosbaez: The geometry of music! Red lines are major thirds; green are minor thirds; blue are perfect fifths. Learn more: https… 3 weeks ago
 RT @is_fink: 4,000 yearold bond https://t.co/vrAJD7k9hV 3 weeks ago
 RT @benorlin: https://t.co/KG9YfM6vFk 2 months ago
 RT @panlepan: Last one for tonight! 🚣♀️ https://t.co/UWiAyvcxD8 3 months ago

Recent Posts
 My Letter to the Wall Street Journal
 Quarter the Cross: An Elegant Construction
 Quarter the Cross
 My FT Alphaville Commentary on Managing U.S. Treasury Debt
 NAMA in NOLA
 Taming Premium Bonds
 Fifth Annual Municipal Finance Conference
 Generating Sitemap Links with Excel
 Spaghetti Puzzle #1
 A Mathematician’s New Year’s Resolutions
Top Posts & Pages
 Fast Formulas #1: Average Life of Mortgage (as Scheduled)
 Fast Formulas #2: Average Life of Mortgage (Amortizing with Balloon)
 Fast Formulas #3: Pool Average Life with CPR Prepayments
 Fast Formulas #3: The Spreadsheet
 Puzzle #2: Weighted Average LTV
 About
 Financial Math Puzzles
 Fast Formulas #5: QuasiGeometric Series (The Other Trick)
 Puzzle #1: Mortgage Average Life
 Puzzle #3: Mortgage with Balloon
Recent Comments
Rod on Puzzle #2: Weighted Average… My Letter to the Wal… on The National Debt is Closer th… Bob Rosinsky on Quarter the Cross Win Smith on Fast Formulas #1: Average Life… Win Smith on Quarter the Cross Bob Rosinsky on Quarter the Cross Mohammed Mustafa on Fast Formulas #1: Average Life… Win Smith on Fast Formulas #2: Average Life… Tianhang on Fast Formulas #2: Average Life… Win Smith on NAMA in NOLA Categories
Archives
Tag Cloud
Average Life Formula Benjamin T. Solomon Big Data Bond Math Bond Math Puzzle Bond Puzzle Brandeis University Brookings Institution Calculus Calendar Puzzle Callable Premium Bonds Carmen Reinhart Christmas Trees Closed Formula Conferences Cool Graphs Derivative Excel Tables Fast Formulas Federal Reserve Finance Math Puzzle Financial Math Floating Rate Debt FRNs GARP Geometric Series Gravitation Halton Sequence Humor Innovations Interest Rate Risk Japan Johann Sebastian Bach Ken Rogoff Loan Average Life Marc Faber Math MATLAB Matt Henderson MortgageBacked Securities Municipal Bonds Municipal Finance Conference Optimization Physics Pi Day Precious Metals Prime Numbers Public Debt Pure Math Puzzle Puzzle #1 Puzzle #2 Puzzle #3 QuasiGeometric Series Quasirandom Quotes QWAFAFEW Representing Numbers Seeking Alpha Space Travel Spreadsheet Tips Talks TED Talks The Bond Buyer Thomas Herndon Treasury Debt Treasury Floaters Tsunami U.S. Treasury U.S. Treasury Debt UC Denver volunteerAKITA Weighted Average Life Weighted Average LTV Weighted Average MaturityBlogroll
Consultants
Father/Daughter Math Adventures
LinkedIn
My Company
Recommended Music
Tumblr
Meta
Tag Archives: Matt Henderson
Fast Formulas #4: Geometric Series (One of the Tricks)
In Fast Formulas #3: Pool Average Life with CPR Prepayments, I presented Formula 3.1, a shortcut calculation for the average life of a loan pool under a constant prepayment assumption. I mentioned that Formula 3.1 was derived by using “a … Continue reading
Posted in Fast Formulas, Math
Tagged David Hilbert, Fast Formulas, Geometric Series, Math, Matt Henderson
5 Comments
A New(?) Way to Visualize Numbers
After I saw Matt Henderson’s visual demonstration of how the geometric series 1/4 + 1/16 + 1/64 . . . adds to 1/3, I thought about how to generalize this for any geometric series. This led to a way to … Continue reading
Posted in Fun, Graphic Presentation, Math, Visualization
Tagged Georg Cantor, Matt Henderson, Pi, Pure Math, Representing Numbers, Visualizing Numbers
Leave a comment
A Cool Math Blog
Matt Henderson of Cambridge (UK) has a terrific math blog that is full of very cool animations. Here is an example, showing that the infinite geometric series 1/4 + 1/16 + 1/64 + … adds to 1/3: His latest post … Continue reading
Posted in Fun, Graphic Presentation, Math
Tagged Chaos, Cool Graphs, Geometric Series, Matt Henderson
2 Comments