p.s. for the record, here are today's changes, against the current TOC is
 Intro (rewritten )
 1 Writing a φ-base number in standard form (original, maybe minor edits)
 2 Representing integers as Golden mean base numbers (no change)
  2.1 Non-uniqueness (new)
 3 Representing Rationals as Golden mean base numbers (new - what got me started)
 4 Addition, subtraction, multiplication (rewritten)
  4.1 Calculate then convert to standard form (was old section 4)
  4.2 Avoiding digits other than 0 and 1 (a new point of view)
 5 Division (rewritten)
 6 A Close relation: Fibonacci Representation (new)
 7 External Links (orig)