[r-t] Ben Constant's Yorkshire Royal

[edward martin]

Yes. It was Roger Bailey who demonstrated this..I .can't quote when,
but I do remember reading it in the RW

mew

2009/1/14 Fielding Ian <I.Fielding at rbht.nhs.uk>:
>
> I seem to remember that a string of calls was attached to turn the
> composition into a round block after coming into 52436 at the middle -
> (HWH I think). Although that made the compositions false it enabled
> proof that the composition by A Tyler could be described as a reversal
> of Brian Price's.
>
> Ian Fielding
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> -----Original Message-----
> From: ringing-theory-bounces at bellringers.net
> [mailto:ringing-theory-bounces at bellringers.net] On Behalf Of Don
> Morrison
> Sent: 14 January 2009 15:32
> To: ringing-theory at bellringers.net
> Subject: Re: [r-t] Ben Constant's Yorkshire Royal
>
> On Wed, Jan 14, 2009 at 10:12 AM, Mark Davies <mark at snowtiger.net>
> wrote:
>>> How do you handle the case of the amusing 5,090 of Cambridge that was
> the
>>> subject of extended discussion in the RW some years ago
>>
>> Remind me of that one again?
>>
>> With compositions round at the snap you can argue that there is no
> symmetry,
>> at the level of the lead anyway. However in practice such compositions
> can
>> often be viewed as false round-blocks, where the first incidence of
>> falseness is rounds at the snap, and hence rotation and reflections
> can be
>> applied. Is that what happened here?
>
> Yes. Though possibly not the first instance of falseness being at the
> snap -- it may be that there was a single added or substituted to
> bring it round before the falseness occurred.
>
> In any case, it would seem difficult to extend the invariant under
> rotations and reversals case to this unambiguously, when no one has
> actually written down the entire block that is being rotated or
> reversed. Perhaps as a worst case, I can imagine instances existing
> where the false, parent block is more than twice as long as the peal,
> and the two competing compositions don't even share any of the bits of
> calling that are preserved.
>
>
>
> --
> Don Morrison <dfm at ringing.org>
> "Practice doesn't make perfect, nor is it supposed to.  Practice is
> about increasing your repertoire of ways to recover from your
> mistakes."                                          -- Joann C Gutin
>
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