ó
~9­\c           @   s  d  Z  d d l m Z d d l m Z m Z m Z d d l m Z m	 Z	 m
 Z
 m Z m Z m Z m Z m Z m Z m Z m Z d d l m Z m Z d d l m Z e d e	 e
 e f d e e e e e e e f ƒ Z e e e ƒ Z e d	 e e e f d
 e d d ƒ Z d S(   sÜ   
Naturalunit system.

The natural system comes from "setting c = 1, hbar = 1". From the computer
point of view it means that we use velocity and action instead of length and
time. Moreover instead of mass we use energy.
iÿÿÿÿ(   t   division(   t   ct   eVt   hbar(   t   DimensionSystemt   actiont   energyt   forcet	   frequencyt   lengtht   masst   momentumt   powert   timet   velocity(   t   PREFIXESt   prefix_unit(   t
   UnitSystemt	   base_dimst   derived_dimst   baset   unitst   names   Natural systemN(   t   __doc__t
   __future__R    t   sympy.physics.units.definitionsR   R   R   t   sympy.physics.units.dimensionsR   R   R   R   R   R	   R
   R   R   R   R   t   sympy.physics.units.prefixesR   R   t   sympy.physics.units.unitsystemR   t   _natural_dimR   t   natural(    (    (    sB   lib/python2.7/site-packages/sympy/physics/units/systems/natural.pyt   <module>
   s   L