Mathematics

What turned me on to mathematics

The Joy of Six

Mathematical Phantoms

Ptolemy and nonArchimedes

The closed subgroup theorem
 The Isbell, Kriz, Pultr, Rosicky theorem (sorry, no accents)
that a localic subgroup of a localic group is closed.

Peripatetic Seminar on Sheaves and Logic 19761999

Riley



Argument in 1 and 2 dimensions
 Some algebralite inspired by
an amusing talk If time were 2dimensional to an undergraduate mathematics society
by Christopher Zeeman in 1957 or thenabout.

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