|  |  7.5.13.0. dmodGeneralAssumptionCheck Procedure from librarydmodloc.lib(see  dmodloc_lib).
 
Example:Usage:
dmodGeneralAssumptionCheck();
Return:
nothing, but checks general assumptions on the basering
Note:
This procedure checks the following conditions on the basering R
and prints an error message if any of them is violated:
- R is the n-th Weyl algebra over a field of characteristic 0,
 - R is not a qring,
 - for all 1<=i<=n the identity var(i+n)*var(i)=var(i)*var(i+1)+1
holds, i.e. the sequence of variables is given by
 x(1),...,x(n),D(1),...,D(n), where D(i) is the differential
operator belonging to x(i).
 
 |  | LIB "dmodloc.lib";
ring r = 0,(x,D),dp;
dmodGeneralAssumptionCheck(); // prints error message
==>    ? Basering is not a Weyl algebra
==>    ? leaving dmodloc.lib::dmodGeneralAssumptionCheck (0)
def W = Weyl();
setring W;
dmodGeneralAssumptionCheck(); // returns nothing
 | 
 
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