[r-t] Foundational definitions (was Lead-based methods [was: Poll on consecutive blows in the same position])

[Matthew Frye]

On 30 Dec 2014, at 18:30, Don Morrison <dfm at ringing.org> wrote:
> On Tue, Dec 30, 2014 at 10:50 AM, Don Morrison <dfm at ringing.org> wrote:
>> Does a method at stage N have to be able to be applicable to any
>> possible row of stage N?

> On balance I'm inclined to
> believe it better to just make it go away for β-methods and still allow
> it for α-methods.

I don't think there's anything to worry about for β-methods. The criterion for β-methods is that the same sequence of changes are generated from every possible row, therefore if a β-method is applicable to one row it is equally applicable to every row. It is probably safe to assume that all methods will always be applicable to at least one row.

MF