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Category: General

CQ Brown Oct 2023

  • khoitsma
  • Engineering, General
  • 0 Comments

Texan and Texas Tech in the news

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Design for Flood, Wind, Seismic, Snow, Ice, and Fire Aug 2023

  • khoitsma
  • Engineering, General, Observation
  • 0 Comments

…

Overview
Flood
Wind
Earthquake
Snow and Ice
Fire

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Small Ideas — Large Effects Aug 2023

  • khoitsma
  • Concept, editor's pick, Engineering, General, History, Mathematics, Science, Software
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Six Mechanical Powers

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Instant Access to all Posts

  • khoitsma
  • General, List, Personal
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Tabular list of all posts

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Math Test Jun 2023

  • khoitsma
  • General, Mathematics
  • 0 Comments

question 4

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Solitary Math Jun 2023

  • khoitsma
  • editor's pick, General, Mathematics
  • 0 Comments

Christopher Havens

Plenty of time to do math
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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
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Diaorifa

Recent Posts

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  • Not Quite Uniform Loadings Aug 2026
  • p5 test Jul 2026
  • Divisibility July 2026
  • Narlin Beaty’s Polyominos June 2026
  • Protected: Custom iPhone Shortcuts May 2026
  • Marion Walter’s Theorem May 2026
  • Derive the Stiffness Matrix for a Beam Apr 2026
  • UIL Number Sense Mar 2026
  • Navigate this blog by Category Mar 2026
  • How Likely Feb 2026

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