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    Let K be a field and (c,d) a pair of relatively prime positive integers. We    
     explain the computation of the Grothendieck group of algebras of the type     
 K(z,x_1,x_2,...x_n), with relation z power c=f(x_1,x_2...x_n) where f is isobaric 
                                   of weight d.                                    
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