[r-t] Doubles 240s

Alexander Holroyd holroyd at math.ubc.ca
Thu Mar 26 10:48:13 UTC 2015

On the one serious issue here (thanks Mark), why is it necessary to be 
able to "distinguish" purely from the rows rung?

A band that rings a 5-part extent of plain bob minor is free to claim it 
as plain bob, original with various calls, or a 5-lead method with no 

Similarly, a band that rings a 5040 of minor that has all 7 occurrences of 
rounds at the beginning is free to regard it as that, or alternatively as 
a 5034 that is missing 6 rows (and would therefore not be a true MEB).

> On Fri, 20 Mar 2015, Mark Davies wrote:
>> To muddy things further, what if the MEB started with seven rows of rounds? 
>> How would we distinguish the six "material" identity changes required for 
>> this start from the indeterminate number of non-material identity changes 
>> in the rounds beforehand?
>> I just don't like this very much!
>> MBD

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