General Report on Tunny

25Y Page 194

 
 

By changing the sign of ΔP1
        
   
                                     (Y2)

Changing the sign of ΔP1, ΔP2
       (Y3)

whence (or otherwise)
       (Y4)

Evidently, unless the Πx is larger than is probable in cipher, as distinct from key, the P.Bs. of 1./2+6., 1x/2+6x do not differ sufficiently to justify running them separately.

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