P_MULT Function
Multiplies two polynomials.
Usage
result = P_MULT(a, b)
Input Parameters
a—The array of coefficients of the first polynomial.
b—The array of coefficients of the second polynomial.
Returned Value
result—An array of coefficients representing the product of the two polynomials.
Keywords
None.
Discussion
Polynomial multiplication simply amounts to convolving the coefficients of the polynomials. P_MULT uses the CONVOL1D function to perform this operation.
Example
In this example, two polynomials with real coefficients are multiplied: a(x) = 1 + x and b(x) = 1 + 2x + 2x2 + x3. The solution should be (1 + x)(1 + 2x + 2x2 + x3) = 1 + 3x + 4x2 + 3x3 + x4.
a = [1, 1]
b = [1, 2, 2, 1]
c = P_MULT(a, b)
PM, c
; 1.0000000
; 3.0000000
; 4.0000000
; 3.0000000
; 1.0000000
; Which matches the expected solution.
See Also
For Additional Information
Blahut, 1985
