getGWClass -- returns the Grothendieck-Witt class of the stable part of an unstable Grothendieck-Witt class

• Usage:

  getGWClass(beta)

• Inputs:
  • beta, an Unstable Grothendieck-Witt Class, an unstable Grothendieck-Witt class
• Outputs:
  • a Grothendieck-Witt Class, the Grothendieck-Witt class of the stable part of the unstable Grothendieck-Witt class

i1 : M = matrix(QQ, {{0,1},{1,0}})

o1 = | 0 1 |
     | 1 0 |

              2       2
o1 : Matrix QQ  <-- QQ

i2 : alpha = makeGWuClass(M, -9)

o2 = (| 0 1 |, -9)
      | 1 0 |

o2 : UnstableGrothendieckWittClass

i3 : getGWClass alpha

o3 = | 0 1 |
     | 1 0 |

o3 : GrothendieckWittClass