[r-t] parity

[Edward W Martin]

Hey there Mark

Are you in Sewanee for real???
cool

The easiest way that I know of finding the parity of a row (without using 
computers) is
Write out rounds on as many bells as are involved
Immediately below this ( several inches away) write out the row in question.

With lines, join up 1 to 1; 2 to 2 etc and when finished, count up how many 
intersections. If odd then the parity = odd if even then parity = even
mew

PS we are off to Tennessee (Nashville) for 4 days but I think this is still 
quite a bike-ride to Sewanee - anyhoo, all the best,
Come up to DC sometime soon and bring the new Sewanee learners - perhaps a 
quarter peal weekend or just a general ringing session


----- Original Message ----- 
From: "Michael Schulte" <michaelfschulte at yahoo.com>
To: <ringing-theory at bellringers.net>
Sent: Monday, August 08, 2005 1:42 PM
Subject: [r-t] Composing spliced treble-dodging major

> Mark each row of the lead with a '+' if the row is of even parity or a '-' 
> if the row is of odd
> parity. (Parity is quite simply determined by calculating how many 
> transpositions - or called
> changes if you prefer, so long as each call swaps only one pair of 
> adjacent bells - it would take
> to get from rounds to the row at which you are looking. If it takes an odd 
> number of calls, then
> the parity is odd. If an even number of calls, the parity is even.)
>
> ====
> Mike Schulte
> Sewanee, Tennessee, USA
>
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