[r-t] What's the meaning of a method having a particular falsecourse head
Earisp at rsc.org
Thu Apr 21 08:06:11 UTC 2005
I might have got this round my neck, but I thought it's obvious that all
methods have A falseness, as Richard says.
Using treble-dodging major methods and keeping the tenors-together, I
thought the whole point of falseness groups was to group up the courses
beginning with any of the 60 in-course leadheads by falseness against
the plain course. Now 12345678 is an in-course leadhead, and so any
method where this is false against the plain course will have 'A'
falseness. Trivially all methods have this property.
"It would seem that having a definition where every method must contain
A falseness means it doesn't add any information"
It's the identity case, but I don't think that means it doesn't add any
information. Following similar logic, would you abolish the number zero
because this doesn't add any information?
From: Don Morrison [mailto:dfm at mv.com]
Sent: 20 April 2005 21:01
To: Ringing Theory List
Subject: [r-t] What's the meaning of a method having a particular
The recent correspondence about methods with particularly heinous
falseness has often used A falseness as something present in every
method. Which raises a question:
What, precisely, do we mean when we say a method has a particular
falseness? Does it mean that there are two different rows in the
course, so related? Or that there are two rows, possibly the same, so
related? Or something else entirely?
In the first case, above, A falseness would only be present if a method
were false in its plain course.
In the second case, which I believe Richard has used in his examples,
every method must contain A falseness. Or at least, every method with
at least one row in its plain course :-)
Or is there a third possibility?
It would seem that having a definition where every method must contain
A falseness means it doesn't add any information, whereas having it
mean the method is false in the plain course does add information, and
may be a preferable convention.
Is either interpretation widely used to the exclusion of the other?
Don Morrison <dfm at mv.com>
"We are well aware from the history of science that ideas
universally believed are not necessarily true."
-- Jane Jacobs, _The Economy of Cities_
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