If both constructed bloom filters use the same seed and the same number of hash functions, yes. Assuming the input filters were optimal for a given FP rate, the resulting filter will be worse.

--
Pieter

On 17 Aug 2013 16:01, "Jeff Garzik" <jgarzik@bitpay.com> wrote:
Consider wallet A builds bloom filter A' and wallet B builds bloom
filter B'.  Can A' and B' be or'd together to form a single bloom
filter C' ?

--
Jeff Garzik
Senior Software Engineer and open source evangelist
BitPay, Inc.      https://bitpay.com/

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