Opened 3 years ago

Last modified 3 years ago

#19130 new defect

inconsistencies of .subs() for multivariate polynomials

Reported by: vdelecroix Owned by:
Priority: major Milestone: sage-6.9
Component: algebra Keywords:
Cc: tmonteil, bruno Merged in:
Authors: Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

Description

sage: R.<x,y,z> = ZZ[]
sage: x.subs({x:1}).parent()
Multivariate Polynomial Ring in x, y, z over Integer Ring
sage: x.subs({x:1, y:1, z:1}).parent()
Multivariate Polynomial Ring in x, y, z over Integer Ring

compared to the univariate case

sage: R.<t> = ZZ[]
sage: t.subs({t:1}).parent()
Integer Ring

Note also that we have

sage: x.subs({x:RDF(1)}).parent()
Real Double Field

Change History (1)

comment:1 Changed 3 years ago by vdelecroix

  • Cc bruno added
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