#8327: Implement the universal cyclotomic field, using Zumbroich basis
---------------------------------------------------+------------------------
   Reporter:  nthiery                              |          Owner:            
                       
       Type:  enhancement                          |         Status:  
needs_work                       
   Priority:  major                                |      Milestone:  sage-4.8  
                       
  Component:  number fields                        |       Keywords:  
Cyclotomic field, Zumbroich basis
Work_issues:  Rebase wrt #10771. Fix one doctest.  |       Upstream:  N/A       
                       
   Reviewer:                                       |         Author:  Christian 
Stump, Simon King      
     Merged:                                       |   Dependencies:  #10771    
                       
---------------------------------------------------+------------------------
Changes (by SimonKing):

  * status:  needs_review => needs_work
  * work_issues:  Rebase wrt #10771. Fix doctests. => Rebase wrt #10771.
                  Fix one doctest.


Comment:

 Starting with sage-4.8.alpha0 plus the new Cython plus your patch (rebased
 in the obvious way) plus the lazy_import patch, we are down to one error:
 {{{
 sage -t  "devel/sage-
 main/sage/rings/universal_cyclotomic_field/universal_cyclotomic_field.py"
 **********************************************************************
 File "/mnt/local/king/SAGE/rebase/sage-4.8.alpha0/devel/sage-
 main/sage/rings/universal_cyclotomic_field/universal_cyclotomic_field.py",
 line 274:
     sage: UCF.is_subring(UCF)
 Expected:
     True
 Got:
     False
 **********************************************************************
 1 items had failures:
    1 of   4 in __main__.example_5
 ***Test Failed*** 1 failures.
 For whitespace errors, see the file
 /mnt/local/king/.sage/tmp/universal_cyclotomic_field_4421.py
          [3.3 s]
 }}}
 Any idea why that occurs?

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8327#comment:54>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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