# Sage, Macaulay2, and my delta_1 calculator

The Sage worksheet delta-one-via-gröbner-basis.sws allows you to input a knot and calculate $$\delta_1$$ of that knot.  See my paper for a definition of $$\delta_1$$ and a description of the algorithm.  To get this worksheet to run, you need to download

Once Macaulay2 is working inside Sage, upload the delta-one-via-gröbner-basis.sws worksheet into the Sage notebook interface.  There you can see some examples of a $$\delta_1$$ calculation and learn how to compute $$\delta_1$$ for any examples you wish.