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NCMatrix * Matrix -- Product of NCMatrices

Synopsis

Description

This command allows for the product of composable NCMatrices (or ordinary matrices over the base).

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

o1 = B

o1 : NCQuotientRing
i2 : M = ncMatrix {{x, y, z}}

o2 = | x y z |

o2 : NCMatrix
i3 : sigma = ncMap(B,B,{y,z,x})

o3 = NCRingMap B <--- B

o3 : NCRingMap
i4 : N = ncMatrix {{M},{sigma M}, {sigma sigma M}}

o4 = | x y z |
     | y z x |
     | z x y |

o4 : NCMatrix
i5 : L = map(QQ^3,QQ^3,{{2,0,0},{1,2,0},{1,2,3}})

o5 = | 2 0 0 |
     | 1 2 0 |
     | 1 2 3 |

              3        3
o5 : Matrix QQ  <--- QQ
i6 : N*L

o6 = | z+y+2*x 2*z+2*y 3*z |
     | z+2*y+x 2*z+2*x 3*x |
     | 2*z+y+x 2*y+2*x 3*y |

o6 : NCMatrix

Ways to use this method: