Description: Multiplicative property of the prime count pre-function. Note that the primality of P is essential for this property; ( 4 pCnt 2 ) = 0 but ( 4 pCnt ( 2 x. 2 ) ) = 1 =/= 2 x. ( 4 pCnt 2 ) = 0 . Since this is needed to show uniqueness for the real prime count function (over QQ ), we don't bother to define it off the primes. (Contributed by Mario Carneiro, 23-Feb-2014)
Ref | Expression | ||
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Hypotheses | pcpremul.1 | |
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pcpremul.2 | |
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pcpremul.3 | |
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Assertion | pcpremul | |