File 14 - George Spencer-Brown and the Four Colour Theorem

3 folders

Folder 1: Correspondence between Tim Robinson and George Spencer-Brown, picking up on an earlier relationship in the 1960s, when Tim Robinson, while working as an artist drew the diagrams for the first edition of 'Laws of Form'. Robinson is searching for English language material on the four colour theorem for 'My Time in Space'. The exchanges are difficult in parts, and a subsequent letter from David Whittaker to Tim Robinson relays his personal experiences with the unpredictable Spencer-Brown. Copy letter to Dr Robin Wilson in Oxford on his 'Four Colours Suffice'. (2003).

Folder 2: Printed email from John Cosgrave, enclosing a photocopy of Spencer-Brown's manuscript article on 'Primes between Squares', which Spencer-Brown wished Tim to pass on to John. Some personal comments are exchanged. (Possibly restrict).

Folder 3: Notes, graphs and printed out articles about the Four Colour Theorem, includes copies of some of George Spencer-Brown's notes. Copy of an article 'Mathematical Games, the colouring of unusual maps leads into uncharted territory' by Martin Gardner.

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05/11/2016
29/07/2025