Category: Disambiguation Stiffness is the resistance of an elastic body to deflection or deformation by an applied force. ... In mathematics, a stiff equation is a differential equation for which certain numerical methods for solving the equation are numerically unstable, unless the step size is taken to be extremely small. ... In mathematics, an ordinary differential equation (or ODE) is a relation that contains functions of only one independent variable, and one or more of its derivatives with respect to that variable. ... Mary Roach at her Washington D.C. audition Mary Roach, 18, of Manassas, Virginia was one of many hopefuls who auditioned for American Idol Season 4. ... David Wenham (born 21 September 1965) is an Australian actor who has appeared in movies, television series and theatre productions. ... relation graph theory In mathematics, the graph of a function f is the collection of all ordered pairs (x,f(x)). In particular, graph means the graphical representation of this collection, in the form of a curve or surface, together with axes, etc. ... An anion is an ion with negative charge. ... A cation is an ion with positive charge. ... The mole (symbol: mol) is the SI base unit that measures an amount of substance. ... Stiff Records is a record label created in London in 1976 by entrepreneurs Dave Robinson and Andrew Jakeman (aka Jake Riviera), and active until 1985. ... Leaving some small change on a restaurant table is a common way of giving a tip to the serving staff. ... The erection of the penis, clitoris or a nipple is its enlarged and firm state. ... This article does not cite any references or sources. ... To be stiff in professional wrestling is to hit an opponent with more force so as to make the attacks seem real to the fans. ... Functional group of an alcohol molecule. ... Image File history File links Disambig_gray. ...