Still, a highly irregular period is usually a sign that something else isn't right in your body.. Take note of these 10 things that could be messing with your menstrual cycle, and see your doc if anything seems too far off. 1 of 12. View as one page.
immutable - not subject or susceptible to change or variation in form or quality or nature; the view of that time was that all species were immutable, created by God
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.