Memory failure again...
Mike
On 27/02/2018 11:37, R.E. Boss wrote:
-----Original Message-----
From: Programming [mailto:[email protected]]
On Behalf Of 'Mike Day' via Programming
Sent: dinsdag 27 februari 2018 11:31
To: [email protected]
Subject: Re: [Jprogramming] Separating digits
(....)
You might remember David Singmaster flogging the idea in his essays on the
Rubik cube, years ago; he called turn sequences such as R U^_1 L U R^_1
commutators (I think!)
J might code such an operation as L&.U&.(R^:_1) .
AFAICS, within Rubik's cube theory, U^_1 L U is called a conjugate, so R U^_1 L
U R^_1 is a double conjugate, whereas commutators are of the form R^_1 U^_1 R U.
R.E. Boss
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