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11.8.4  Multiplication in ℤ/pℤ or in ℤ/pℤ[x]

The * operator multiplies two integers in ℤ/pℤ or two polynomials in ℤ/pℤ[x]. (See also Section 7.3.2.) For polynomial expressions, use the normal command to simplify.

Examples

For integers in ℤ/pℤ:

31%13*10%13
     

−2
%13
          

For polynomials with coefficients in ℤ/pℤ:

normal((11*x+5)%13*(8*x+6)%13)

or:

normal((11%13*x+5%13)*(8%13*x+6%13))
     


−3
%13
x2+

−24
%13
x+17%13
          

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