Από τη Βικιπαίδεια, την ελεύθερη εγκυκλοπαίδεια
	    
	    	    	    
	    
Displayed is
- 
- the number of primes less than or equal to x, labelled Π(x) (blue)
- an approximation using  (green) (green)
- an approximation using the logarithmic integral  (red) (red)
 
Created with Maple: plot({[seq([x,pi(x)],x=0..100000)],x/ln(x),Li(x)-Li(2)},x=0..100000,Pi[x]=0..10000,color=[blue,green,red]);
Author: FredStober
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