#19425: Order in symbolic ring: error calling operator
-----------------------------+-------------------------
Reporter: dkrenn | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.10
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by rws):
Replying to [comment:1 cheuberg]:
> {{{
> sage: (x+x^2).series(x, 2).operator() is None
> True
> }}}
The topmost operator in symbolic series `pseries` is not a registered
function, but it can be seen in the expression tree:
{{{
sage: (x+x^2).series(x, 2)._dbgprinttree()
pseries @0x4e2c3b0, hash=0x0, flags=0x3
1 (numeric) @0x35d70d0, hash=0x0, flags=0x7
1 (numeric) @0x35d70d0, hash=0x0, flags=0x7
-----
function Order @0x4c197f0, serial=12, hash=0x0, flags=0x3, nops=1
1 (numeric) @0x35d70d0, hash=0x0, flags=0x7
=====
2 (numeric) @0x35d7130, hash=0x0, flags=0x7
-----
x (symbol) @0x3e5d6d0, serial=5, hash=0xf4f4bfee, flags=0xf, domain=0,
iflags=0000000000000000
0 (numeric) @0x3647180, hash=0x0, flags=0x7
}}}
You can see that the function `Order` is there too. `GiNaC::Order` is
registered in Pynac and imported to Sage (`symbolic/ginac.pxd`). But it
somehow doesn't get into Sage's registry `sfunction_serial_dict` which is
created and used in `symbolic/function.pyx`.
--
Ticket URL: <http://trac.sagemath.org/ticket/19425#comment:3>
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