#17538: Add is_prime() to RingElement
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   Reporter:  jdemeyer             |            Owner:
       Type:  defect               |           Status:  new
   Priority:  major                |        Milestone:  sage-6.5
  Component:  commutative algebra  |         Keywords:
  Merged in:                       |          Authors:
  Reviewers:                       |  Report Upstream:  N/A
Work issues:                       |           Branch:
     Commit:                       |     Dependencies:
   Stopgaps:                       |
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 For various rings, `is_prime()` is implemented for ideals but not
 elements. Since an element `x` of a ring `R` is called ''prime'' if the
 ideal `(x)` is a prime ideal, we should use this to define `is_prime()`
 for elements.

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Ticket URL: <http://trac.sagemath.org/ticket/17538>
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