[r-t] Delta-based transposition representation

[Alan Burlison]

On 10/06/2016 07:43, Glenn Taylor wrote:

> I don't know what you mean by "blue line numbers". Is this somehow related
> to Seagar's Blue Line Proof process, or is it to do with converting rows to
> their index numbers for proof purposes? Or neither?

Like a blue line diagram you'd get from somewhere like 
http://methods.ringing.org but without any of the lines being drawn, 
just a grid of bell numbers - I wasn't quite sure what to call it. The 
aim was just to help me understand how to expand place notation rather 
than produce anything 'proper'.

-- 
Alan Burlison
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