Why pi is float at Mac, and expression elsewhere?
Mac OS X:
┌────────────────────────────────────────────────────────────────────┐
│ Sage Version 6.5, Release Date: 2015-02-17 │
│ Type "notebook()" for the browser-based notebook interface. │
│ Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
sage: pi
3.141592653589793
sage: type(pi)
<type 'float'>
sage: a = pi + e*4/5; a
5.316218116357029
sage: a = 1 + 4/5; a
9/5Linux (x86_64):
┌────────────────────────────────────────────────────────────────────┐
│ Sage Version 6.5, Release Date: 2015-02-17 │
│ Type "notebook()" for the browser-based notebook interface. │
│ Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
sage: pi
pi
sage: type(pi)
<type 'sage.symbolic.expression.Expression'>
sage: a = pi + e*4/5; a
pi + 4/5*e
sage: a = 1 + 4/5; a
9/5
sage:
Are you sure that both installation are the same? pi must be a symbolic expression on any Operating System. Did you override $HOME/.sage/init.sage?
File $HOME/.sage/init.sage is missed at Mac OS X.
On Linux I have empty init.sage