- Mathematical Style at this Site - a README file.

- The Moonfinder A volvelle to find the moon at various phases and times of day, now with versions for both hemispheres.
*v.0.2*.

- Stereographic Projection-III: Astrolabe Errors. - Intrinsic errors in unequal hour lines on astrolabes
*29 January 2013*.

- Stereographic Projection-II: Spherical Trigonometry by Complex Numbers.
*and simplified slightly*

- Using complex numbers for the stereographic projection. Derivation of three formulae of spherical trigonometry.

- Stereographic Projection-I: Spherical Astronomy by Analytical Geometry.
*April 11, 2011.*

- Using analytical geometry for the stereographic projection.

- Intrinsic Errors of Traditional Moon Dials
- Algebras of Digraphs and Posets.

Giving an algebraic way of representing them. - Partially Ordered Historical Events.

An account for mathematicians.

- Style in Mathematical and Scientific Literature.

Article in*The English Miscellany*, occasional publication of the English Department, St Stephen’s College, Delhi, before 1974.

- Reversed Ages.

Pairs of ages such as 78, 87, with a simple study of their occurrence. - Dr Stone’s Mathematical Aphorisms.
- Convert from Centigrade to Fahrenheit in your head.

An exact method. - Two Definitions of Partially Ordered Sets.

Showing how they are equivalent. - Two Definitions of Partially Ordered Sets.

Showing how they are equivalent.

Last updated: 29 January 2013