v.addProduct(sv, vs,2.0);
assertEquals(Vector.of(0,3,0,18,0,0,54,0,0,0),v);
AVector v2=Vectorz.newVector(20).subVector(5, 10);
v2.addProduct(sv, vs);
assertEquals(Vector.of(0,1,0,6,0,0,18,0,0,0),v2);
v2.addProduct(sv, vs,2.0);
assertEquals(Vector.of(0,3,0,18,0,0,54,0,0,0),v2);