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                  DEADLINE EXTENSION FOR THE SPECIAL ISSUE OF JSC

                                       ON  

             EFFECTIVE METHODS IN RINGS OF DIFFERENTIAL OPERATORS 
              
                                          October 15, 2000 


Dear Colleagues, 

We are extending the deadline for submission to the Special Issue of the
Journal of Symbolic  Computation on "Effective Methods in Rings of 
Differential Operators" 

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DEADLINE FOR SUBMISSION: 

The submission deadline for the Special Issue of the Journal of Symbolic

Computation on "Effective Methods in Rings of Differential Operators" 
is October 15,  2000.   

For more details see the webpage at
http://thales.cica.es/usr/castro/specialissue.html 
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Sincerely, 

     F.J. Castro-Jiménez and J.R. Sendra 


-------------------------------------------------------
J.Rafael Sendra
Departamento de Matematicas
Universidad de Alcala
Ap. Correos 20                 Rafael.Sendra@uah.es
28871 Alcala de Henares        Phone. 91-8854902
Madrid, Spain                  FAX.   91-8854951
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