This function adds the elements of vector b to the elements of vector a, a'_i = a_i + b_i. The two vectors must have the same length.
This function subtracts the elements of vector b from the elements of vector a, a'_i = a_i - b_i. The two vectors must have the same length.
This function multiplies the elements of vector a by the elements of vector b, a'_i = a_i * b_i. The two vectors must have the same length.
This function divides the elements of vector a by the elements of vector b, a'_i = a_i / b_i. The two vectors must have the same length.