Quadruple jump controversy important. It's good for me to keep challenging myself. I can't hold back on anything, and taking chances is what sports are about." Plushenko's program was more ambitious and risky with the quadruple toe/ triple toe loop, while Lysacek did not even attempt the quad as a single jump "at the biggest moment on skating's biggest stage." Sports journalist Kevin Blackistone wrote: "What has unfolded at the Vancouver Winter Games in figure skating would be the equivalent of not crediting Shaun White for his double McTwist in the half pipe and rewarding less ambitious snowboarders for getting the basics perfect."
Quadruple product Quadruple product In mathematics, the quadruple product is a product of four vectors in three-dimensional Euclidean space. The name "quadruple product" is used for two different products, the scalar-valued scalar quadruple product and the vector-valued vector quadruple product or vector product of four vectors . The scalar quadruple product is defined as the dot product of two cross products: where a, b, c, d are vectors in three-dimensional Euclidean space. It can be evaluated using the identity: or using the determinant: The vector quadruple product is defined as the cross product of two cross products: where a, b, c, d