Sasso Lungo, Dolomites, Italy

## Rotating Frames of Reference

## Lagrange's equations are used to describe the motion of a particle relative to two rotating frames of reference. This leads to a derivation of Euler's equations for the rotation of a rigid body, and to a discussion of motion relative to the rotating earth. There is nothing original in the article, but the use of Lagrange's equations is interesting.

## Differentiating rational power functions without limits

## James Dent's Diagram for Constructive Reverse Math

## A Guest Professor Reflects

# A Constructive Theory of the Real Line

https://docs.zoho.com/file/5ce0zd6d2f0efc3804f9e92a8641a3004aa23

Notes on fluids and elasticity

https://docs.zohopublic.com/file/qwmf0a317e2cb2c7f4228b758ec5a0ab7fdc9

These are notes typed, for my own edification, in 1970. They cover: basic continuum mechanics; the dynamics of fluids, including the Navier-Stokes equation; deformation of rods and beams.

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Very rudimentary foundations of mathematics

for advanced high-school students

https://www.dsbridges.com/files/SMP%20project%20from%201981%20011123.pdf