Opened 11 months ago

#23806 new defect

do not choose a default affine patch when initialization projective point with too few values

Reported by: bhutz Owned by:
Priority: minor Milestone: sage-8.1
Component: algebraic geometry Keywords:
Cc: Merged in:
Authors: Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

Description

Currently sage allows

sage: P = ProjectiveSpace(QQ,1)
sage: P(0)
(0 : 1)
sage: P = ProjectiveSpace(Q,2)
sage: P([0,0])
(0 : 0 : 1)

essentially by assuming a canonical embedding of affine space into projective space. See the discussion on sage-devel (https://groups.google.com/forum/?fromgroups=#!topic/sage-devel/BPLTcvtJ4dM) concerning this.

Since this is current behavior a deprecation warning will be added and this ticket will be mainly fixing everywhere in Sage that currently relies on this behavior.

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