14.1.7  Scalar product

The dot command finds the dot product of two vectors.

dotP, dotprod, scalar_product, and scalarProduct are synonyms for dot. The infixed operator * and its prefixed form ’*’ will also find dot products.

• dot takes two arguments: V₁ and V₂, two lists (vectors) of the same size.
• dot(V₁,V₂) returns the dot product of V₁ and V₂.

Example

or:

or:

or:

Indeed, 25=1· 4+2· 3+3·5.

Note that * may be used to find the product of two polynomials represented as list of their coefficients, but to avoid ambiguity, the polynomial lists must be poly1[…].