+++ /dev/null
-#!/home/mjo/bin/sage
-
-# example1.py
-#
-# In the paper, we display a lot of sage code to be entered at the
-# prompt. It's not much fun re-entering all of these formulas every
-# time you'd like to work on the paper, so a quick load('example1.py')
-# from the sage prompt will pull all of this stuff in for you.
-#
-
-x,y,z = var('x,y,z')
-
-f = 1 + x + x*y + x*y*z
-
-g = [[[ f(x=a, y=b, z=c) for a in range(0,3) ] for b in range(0,3) ] for c in range(0,3) ]
-
-def grid(x,y,z):
- return g[z][y][x]
-
-def I(x,y,z):
- return grid(x,y,z)
-
-def F(x,y,z):
- return grid(x-1, y, z)
-
-def B(x,y,z):
- return grid(x+1, y, z)
-
-def L(x,y,z):
- return grid(x, y-1, z)
-
-def R(x,y,z):
- return grid(x, y+1, z)
-
-def T(x,y,z):
- return grid(x, y, z+1)
-
-def D(x,y,z):
- return grid(x, y, z-1)
-
-def FL(x,y,z):
- return grid(x-1, y-1, z)
-
-def FR(x,y,z):
- return grid(x-1, y+1, z)
-
-def FD(x,y,z):
- return grid(x-1, y, z-1)
-
-def FT(x,y,z):
- return grid(x-1, y, z+1)
-
-def BL(x,y,z):
- return grid(x+1, y-1, z)
-
-def BR(x,y,z):
- return grid(x+1, y+1, z)
-
-def BD(x,y,z):
- return grid(x+1, y, z-1)
-
-def BT(x,y,z):
- return grid(x+1, y, z+1)
-
-def LD(x,y,z):
- return grid(x, y-1, z-1)
-
-def LT(x,y,z):
- return grid(x, y-1, z+1)
-
-def RD(x,y,z):
- return grid(x, y+1, z-1)
-
-def RT(x,y,z):
- return grid(x, y+1, z+1)
-
-def FLD(x,y,z):
- return grid(x-1, y-1, z-1)
-
-def FLT(x,y,z):
- return grid(x-1, y-1, z+1)
-
-def FRD(x,y,z):
- return grid(x-1, y+1, z-1)
-
-def FRT(x,y,z):
- return grid(x-1, y+1, z+1)
-
-def BLD(x,y,z):
- return grid(x+1, y-1, z-1)
-
-def BLT(x,y,z):
- return grid(x+1, y-1, z+1)
-
-def BRD(x,y,z):
- return grid(x+1, y+1, z-1)
-
-def BRT(x,y,z):
- return grid(x+1, y+1, z+1)
-