robin at robinw.org.uk
Thu May 17 07:04:09 UTC 2012
there are 720 different FCH for major methods which divide into two -
positive and negative.
each half divides into groups of size mod7 except for rounds (the 'spurious'
group A) and group Z - 546732 and 763245
Unlike Graham, I have a nicely printed copy which I derived myself - but it
can be found also in ?John Ridley's? CC book.
If any one is interested, I'll put it on my web-site.
More information about the ringing-theory