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From: David Bremner <david@tethera.net>
To: Xu Wang <xuwang762@gmail.com>, notmuch@notmuchmail.org
Subject: Re: find threads where I and Jian participated but not Dave
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Date: Tue, 13 Jun 2017 20:31:19 -0300
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Xu Wang <xuwang762@gmail.com> writes:

> I bump this. Actually more simple than that, how to search for thread
> in which I have participated and Jian has participated? Excluding
> threads in which Dave participated is perhaps more complicated.

I don't know of an efficient way to do this. You could write a script
something like

notmuch search --output=threads from:Xu  > A
notmuch search --output=threads from:Jian  > B
comm -12 A B

I think the output is sorted, but you might also have to sort A and B