 
discrete curve


last updated: 20051026 
A discrete function has values only for the natural numbers (n). Giving to the interval [n
 1/2, n + 1/2] the value of f(n), we get a bar formed curve, a histogram.
When the discrete function gives a percentage, and the function values have been
ordered from high to low, the curve is called a Pareto
diagram.
We shall see that some discrete curves for large n can be approached by (often
exponential) continuous functions.
The following discrete curves can be distinguished:
 factorial
 prime related function
 (discrete) probability distribution
The function gives the probability that a value n occurs. Simple functions are the univalent
distribution (just one value)
and the alternative
distribution (two different values).
Others distributions are:
