#7797: Full interface to letterplace from singular
-------------------------------------------------------------------+--------
       Reporter:  burcin                                           |         
Owner:  burcin          
           Type:  enhancement                                      |        
Status:  needs_work      
       Priority:  major                                            |     
Milestone:  sage-5.4        
      Component:  algebra                                          |    
Resolution:                  
       Keywords:  singular, free algebra, letterplace              |   Work 
issues:                  
Report Upstream:  None of the above - read trac for reasoning.     |     
Reviewers:  Alexander Dreyer
        Authors:  Simon King, Michael Brickenstein, Burcin Erocal  |     Merged 
in:                  
   Dependencies:  #4539, #11268, #12461, #12749, #12988, #13237    |      
Stopgaps:                  
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Comment (by jdemeyer):

 Solaris SPARC, Sage 5.2 (i.e. Singular-3-1-3-3):
 {{{
 ----------------------------------------------------------------------
 | Sage Version 5.2, Release Date: 2012-07-25                         |
 | Type "notebook()" for the browser-based notebook interface.        |
 | Type "help()" for help.                                            |
 ----------------------------------------------------------------------
 sage: sage.libs.singular.function.singular_function("system")("uname",
 ring=PolynomialRing(QQ,2,'x'))
 // ** s_internalDelete: cannot delete type sqrfree(493)
 ---------------------------------------------------------------------------
 RuntimeError                              Traceback (most recent call
 last)

 /home/jdemeyer/mark/sage-5.2/<ipython console> in <module>()

 /home/jdemeyer/mark/sage-5.2/local/lib/python2.7/site-
 packages/sage/libs/singular/function.so in
 sage.libs.singular.function.SingularFunction.__call__
 (sage/libs/singular/function.cpp:11875)()

 /home/jdemeyer/mark/sage-5.2/local/lib/python2.7/site-
 packages/sage/libs/singular/function.so in
 sage.libs.singular.function.call_function
 (sage/libs/singular/function.cpp:13425)()

 RuntimeError: Error in Singular function call 'system':
  system(`sqrfree`) failed
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7797#comment:83>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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