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Category: Blog Navigation

Bow Out Aug 2025

  • khoitsma
  • Blog Navigation, General, Observation, Personal
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Galleries Aug 2023

  • khoitsma
  • Blog Navigation
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I added this post as a convenient link to my gallery pages.

  • General
  • Antarctica
  • Seismology
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Recent Posts

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  • Blog Navigation
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Tabular List — Blog Entry Search

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  • Blog Navigation, General
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Recent Posts

  • Bow Out Aug 2025
  • Automated Foundation Rebar Drawing Aug 2025
  • Close Encounters in Batting Averages July 2025
  • 2D Engineering Interpolation Jun 2025
  • Lessons Learned (structural engineering) Apr 2025

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Short Takes
My Dash apps

My GeoGebra app
What is the most general equation for the area of a triangle?
The Wait calculation
The incessant obsolescence postulate (IOP)
Barnard’s Star and the 'Wait Equation'
IOP counterargument
The amazing arbelos (only good on a real desktop)
Surprises found in the arbelos (1954)
Arbelos from Wolfram MathWorld
Circle Theorems
• Circle Theorems Marked
• Circle Theorems — Practice
Two Semicircles
Japanese temple geometry
★ Sister Celine — a beautiful life
★ John Lienhard IV on Ingenuity
★ Charles Stutzenbaker, Field Biologist
Neal Stephenson on the OS
A few quotations

Tyler TX weather • 🌡 Steve Fitzgerald
Tyler TX weather • 3-day history
Tyler TX weather • calendar month
Tyler TX weather • graph month
East Texas weather • TAMU
★ All of the water in the world

Hacker News (from YCombinator)
Diaorifa
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Pentagonal number visual proof

Dice Distribution (bar)

Bayes theorem visual proof

Bayes icon