centralElements -- Finds central elements in a given degree

• Usage:

  centralElements(A,n)

• Inputs:
  • A, an instance of the type NCRing,
  • n, an integer, the homogeneous degree in which to compute central elements
• Outputs:
  • an instance of the type NCMatrix,

i1 : B = threeDimSklyanin(QQ,{1,1,-1},{x,y,z})
--Calling Bergman for NCGB calculation.
Complete!

o1 = B

o1 : NCQuotientRing

i2 : centralElements(B,2)

o2 = | x^2 y*x+x*y y^2 |

o2 : NCMatrix

i3 : centralElements(B,3)

o3 = | y^3-y*x*z+x*y*z-x^3 |

o3 : NCMatrix