#113 closed bug (fixed)
opposite depends on current ring
Reported by: | Oleksandr | Owned by: | Oleksandr |
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Priority: | major | Milestone: | 3-1-1 |
Component: | singular-kernel | Version: | |
Keywords: | opposite, non-commutative | Cc: | hannes |
Description
LIB "nctools.lib"; ring R = 0, (a,b, X, Y, Z), dp; def E = SuperCommutative(3); def EE = opposite(E); // IN R! setring E;E; // characteristic : 0 // number of vars : 5 // block 1 : ordering dp // : names a b X Y Z // block 2 : ordering C // noncommutative relations: // YX=-XY // ZX=-XZ // ZY=-YZ // quotient ring from ideal //_[1]=Z2 //_[2]=Y2 //_[3]=X2 var(3)*var(3); // 0 setring EE; EE; // BUG: no quotient: // characteristic : 0 // number of vars : 5 // block 1 : ordering a // : names z y x B A // : weights 1 1 1 1 1 // block 2 : ordering ls // : names z y x B A // block 3 : ordering C // noncommutative relations: // yz=-zy // xz=-zx // xy=-yx var(3)*var(3); // x2 is wrong! setring E; def EE = opposite(E); // IN E: setring EE;EE; // correct! // characteristic : 0 // number of vars : 5 // block 1 : ordering a // : names z y x B A // : weights 1 1 1 1 1 // block 2 : ordering ls // : names z y x B A // block 3 : ordering C // noncommutative relations: // yz=-zy // xz=-zx // xy=-yx // quotient ring from ideal // _[1]=z2 // correct! // _[2]=y2 // _[3]=x2 var(3)*var(3); // 0 -- correct
Attachments (6)
Change History (10)
Changed 15 years ago by
Attachment: | opposite.tst added |
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Changed 15 years ago by
Attachment: | opposite.tst.log added |
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results of my test of opposite for Exterior algebra: BUG!!!!!!!! (memory access!)
Changed 15 years ago by
Attachment: | opposite_vl.res added |
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at least one bug in opposite is a pure PLURAL heritage bug!
comment:1 Changed 15 years ago by
Version: | 3-0-5 |
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comment:2 Changed 15 years ago by
Resolution: | → fixed |
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Status: | new → closed |
Fixed. Seems to work now. There was something messed up with quotients to sort out.
Note that the resulting ordering may become really weird!
Changed 15 years ago by
Attachment: | opposite_q..log added |
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current ring-dependency has beed resolved somehow
comment:3 Changed 15 years ago by
Cc: | hannes added |
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Dear Hans,
could you please check whether there is anything to be done concerning the weird resulting ring ordering?!
(please, take a look at the file "opposite.log" above)
comment:4 Changed 15 years ago by
Milestone: | → Releases 3-1-1 and higher |
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my test of opposite for Exterior algebra