[r-t] Emergency peal composition

Alexander Holroyd holroyd at math.ubc.ca
Wed Dec 19 22:55:24 UTC 2012

On Wed, 19 Dec 2012, Philip Saddleton wrote:

> To get all 13 leads we must have all 13 lead ends and all 13 lead heads - 
> certain of them happen at calls and the others cannot be paired together.

Yes, you are quite right.  More precisely, the graph of lead head and lead 
end rows (minus the ones that have calls, with edges corresponding to both 
2nd and nth place lead end changes) consists of two paths each with an odd 
number of rows, so it has no perfect matching.

The 16ET hlb for maximus is great - hadn't thought of that! This looks 
alot more like something one might want to ring...

> 5192 Spliced Maximus
> 234567890ET Zanussi S
> ET907856342 Maypole LA
> T0E89674523 Maypole A (h)
> 648305T729E Maypole A
> 57394E628T0 Ariel S
> 8604T325E79 Zanussi S
> 795E324T608 Zanussi S
> 08T624E3957 Ariel S
> 9E725T30486 Maypole A
> T028E694735 Maypole A (h)
> 648507T93E2 Maypole LA
> 4567890ET23 Zanussi S
> 11-part
> (h) is a 16ET half-lead bob

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