easy curve -
41Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
42Public-key cryptography — In an asymmetric key encryption scheme, anyone can encrypt messages using the public key, but only the holder of the paired private key can decrypt. Security depends on the secrecy of that private key …
43BlackBerry — This article is about the wireless e mail device. For the fruit, see Blackberry. For other uses, see Blackberry (disambiguation) …
44Equichordal point problem — In Euclidean plane geometry, the equichordal point problem is the question whether a closed planar convex body can have two equichordal points.[1] The problem was originally posed in 1916 by Fujiwara and in 1917 by Wilhelm Blaschke, Rothe and… …
45Calculus — This article is about the branch of mathematics. For other uses, see Calculus (disambiguation). Topics in Calculus Fundamental theorem Limits of functions Continuity Mean value theorem Differential calculus  Derivative Change of variables …
46Unemployment — World unemployment rates[1] as of January 2009[update] Unemployment (or …
47L-system — An L system or Lindenmayer system is a parallel rewriting system, namely a variant of a formal grammar (a set of rules and symbols), most famously used to model the growth processes of plant development, but also able to model the morphology of a …
48Peak oil — A logistic distribution shaped production curve, as originally suggested by M. King Hubbert in 1956 …
49photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
50Bicycle and motorcycle dynamics — A computer generated, simplified model of bike and rider demonstrating an uncontrolled right turn. An …
