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 | 1 | initial version |
If you remove the comment, you have to replace sgn(SGN) with sgn(SGN(x)).
For me, the problem is in:
show(SGN.parent())
That prints SR, while we have:
SGN.parent()
Callable function ring with argument x
SGN(x).parent()
Symbolic Ring
| | 2 | No.2 Revision |
If you remove the comment, you have to replace sgn(SGN) with sgn(SGN(x)).
For me, the problem is in:
show(SGN.parent())
That prints (LaTeX) SR, while we have:
SGN.parent()
Callable function ring with argument x
SGN(x).parent()
Symbolic Ring
