.. _sagemath: ============================================================= Sage ============================================================= `Sage `_ 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 ``_. You can type straight Python as well as using the enhanced capabilities of Sage. See: * ``_ * ``_ for some online sage examples.