1, the result of dot multiplication: the result is a scalar.

2. The result of cross multiplication: it is a vector instead of a scalar.

Second, the scope of application of the two is different:

1, the application scope of point multiplication: linear algebra.

2. Application scope of cross product: It is also widely used, usually in physical optics and computer graphics.

Third, the overview of the two is different:

1. Overview of point multiplication: The point product is also called quantity in mathematics. The product refers to a binary operation that accepts two vectors on the real number R and returns a real scalar. It is the standard inner product of Euclidean space.

2. Overview of cross product: A binary operation of vectors in vector space. The cross product of two vectors is perpendicular to the sum of these two vectors.

Baidu encyclopedia-dot product

Baidu encyclopedia-cross products