#19093: bug in units conversion
-------------------------+----------------------------
   Reporter:  schymans   |            Owner:
       Type:  defect     |           Status:  new
   Priority:  major      |        Milestone:  sage-6.9
  Component:  symbolics  |         Keywords:  units
  Merged in:             |          Authors:
  Reviewers:             |  Report Upstream:  N/A
Work issues:             |           Branch:
     Commit:             |     Dependencies:
   Stopgaps:             |
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 The .convert() function converts units to their base units, e.g.

 {{{
 sage: (units.energy.joule).convert()
 }}}
 {{{
 kilogram*meter^2/second^2
 }}}
 The units of heat capacity are joule/kelvin/kilogram and since joule is
 not a base unit, it should be possible to convert them to base units.
 However, this throws an error:

 {{{
 sage:
 (units.energy.joule/units.temperature.kelvin/units.mass.kilogram).convert()
 }}}
 {{{
 Traceback (click to the left of this block for traceback)
 ...
 ValueError: Cannot convert
 }}}

 This seems to be the case whenever something is divided by temperature.

--
Ticket URL: <http://trac.sagemath.org/ticket/19093>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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