#8821: Adding a section on coercion to the tutorial (guided tour)
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Reporter: SimonKing | Owner: mvngu
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.4.1
Component: documentation | Keywords: tutorial coercion
Author: Simon King | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by robertwb):
What I should have said is that two incomparable elements are considered
inequal (hence == returns False and != returns True).
Perhaps a better way to describe the class <-> category relationship is to
mention that the type system is not sufficiently expressive to capture the
rich possibilities of mathematical relations (short of hackery like lots
and lots of dynamic types), and that the *parent* of an object has to do
with its place in the mathematical hierarchy, while the *type* of an
object has to do with its underlying implementation.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8821#comment:10>
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