[r-t] regularity

[Robin Woolley]

I agree with Simon Gay - I use 'regular' to mean a method with plain-bob
lead-heads.

Why are non-plain-bob lead-heads irregular in my book?  For one reason
taking Minor as an example, 2nds place and 6ths place irregular methods have 
different lead-ends sets:

2nds place: {63542, 56423, 32654, 45236}
6ths place: {25634, 43265, 56423, 64352}

A consequence of this is that the lead-ends of plain bob are 'regular' also.

'regular' can have several meanings, of course. 'usual' is probably closest.
(CUP on-line)

Best wishes
Robin