The most common differences are in the blue / green area but there are also languages which do not distinguish oranges, they are all variations of brown . "'Sp in ni ng Spark "'12 : 55, 7 February 2009 ( UTC)
22.
:See also Primes in arithmetic progression ( created by me ) whics says : " an AP with common difference " a " cannot contain more consecutive prime terms than the value of the smallest prime that does not divide " a " . " talk ) 01 : 46, 24 August 2010 ( UTC)
23.
It follows from widely believed conjectures, such as Dickson's conjecture and some variants of the prime k-tuple conjecture, that if " p " > 2 is the smallest prime not dividing " a ", then there are infinitely many AP-( " p " & minus; 1 ) with common difference " a ".
24.
This gives a colouring of N2 with m \ choose 2 colours, by colouring ( a, d ) \ in \ mathbb { N } ^ { ( 2 ) } according to which edge of the arithmetic progression with first term a and common difference d is red, where \ mathbb { N } ^ { ( 2 ) } represents the edge-set of \ mathbb { N }.
25.
In defining a common ground in the " critical commentary, " one writer described fellow heterodox economists as trying to do three things : ( 1 ) identify shared ideas that generate a pattern of heterodox critique across topics and chapters of introductory macro texts; ( 2 ) give special attention to ideas that link methodological differences to policy differences; and ( 3 ) characterize the common ground in ways that permit distinct paradigms to develop common differences with textbook economics in different ways.
