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7.3.29 twostd

Syntax:
twostd( ideal_expression);
Type:
ideal
Purpose:
returns a left Groebner basis of the two-sided ideal, generated by the input, treated as a set of two-sided generators. see std
Remark:
There are algebras with no two-sided ideals except 0 and the whole algebra (like Weyl algebras).
Example:
 


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