.. _sagemath: ============================================================= Sage ============================================================= `Sage <http://sagemath.org>`_ is an open source collection of mathematical software with a common Python interface. The lead developer is William Stein, a number theorist in the Mathematics Department at the University of Washington. The Sage notebook was an original model for the :ref:`ipython_notebook`. You can try Sage online by typing into a cell at `<https://sagecell.sagemath.org/>`_. You can type straight Python as well as using the enhanced capabilities of Sage. See: * `<http://interact.sagemath.org/top-rated-posts>`_ * `<http://trac.sagemath.org/sage_trac/>`_ for some online sage examples.