In its Fifth Assessment Report, the Intergovernmental Panel on Climate Change, a group of 1,300 independent scientific experts from countries all over the world under the auspices of the United Nations, concluded there's a more than 95 percent probability that human activities over the past 50 years have warmed our planet.
Scalar multiplication of two vectors (to give the so-called dot product) is commutative (i.e., aÂ·b = bÂ·a), but vector multiplication (to give the cross product) is not (i.e., a Ã b = âb Ã a). The commutative law does not necessarily hold for multiplication of conditionally convergent series.
Definition of Permutation. Permutation is an ordered arrangement of a group of objects. 1  The permutation of n objects taken r at a time is represented as nPr.  The permutation or arrangement of 9 different balls in 3 different rows can be done in 9P3 = 504 ways.