#13125: Reals sets consisting of intervals and isolated points
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Reporter: ares | Owner: Ares Ribó
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.2
Component: calculus | Resolution:
Keywords: | Merged in:
Authors: Volker Braun , | Reviewers: Ralf Stephan
Jordi Saludes , Ares Ribó | Work issues:
Report Upstream: N/A | Commit:
Branch: | fa497ee701f068e3980e458a519805b219b1b791
u/vbraun/ticket/13125 | Stopgaps:
Dependencies: |
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Changes (by vbraun):
* cc: tscrim, robertwb (added)
Old description:
> Finite unions of open/closed/semi-closed subsets of the real line
>
> For example
> {{{
> sage: RealSet(0,2) + RealSet.unbounded_above_closed(10)
> (0, 2) + [10, +Infinity)
> }}}
New description:
Finite unions of open/closed/semi-closed subsets of the real line, for
example
{{{
sage: RealSet(0,2) + RealSet.unbounded_above_closed(10)
(0, 2) + [10, +Infinity)
}}}
This ticket also encountered a number of bugs in the comparison of
infinity with various field elements like
{{{
sage: RLF(0) < oo
False
}}}
These are now also fixed and extensive doctests were added.
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Ticket URL: <http://trac.sagemath.org/ticket/13125#comment:37>
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