Opened 12 years ago

Closed 12 years ago

#338 closed bug (invalid)

Difference between x*d-d*x and xd-dx in Plural

Reported by: albert.heinle@… Owned by: somebody
Priority: critical Milestone: 3-1-4 and higher
Component: dontKnow Version: 3-1-3
Keywords: Plural, parsing, ring Cc: viktor.levandovskyy@…

Description

I typed the following code:

ring R = 0,(x,d),dp;

def r = nc_algebra (1,1); setring(r); xd-dx;

0

x*d-d*x;

-1

It should be the same result, namely -1. But somehow Singular:Plural interprets the first expression as something commutative, which is wrong.

Change History (1)

comment:1 Changed 12 years ago by Oleksandr

Resolution: invalid
Status: newclosed

please see "*-multiplication (plural)" at http://www.singular.uni-kl.de/Manual/3-1-3/sing_387.htm#SEC427

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