I would be interested to hear what anyone has to say about a few questions on
bhava'nga.
1. The etymology seems to be bhava + a'nga = a constituent part of
becoming/existence. Can anyone shed some more light on this?

2. As far as I understand there are only a couple of places bhava'nga is
mentioned in the Abhidhamma, and it is discussed much greater in the
commentaries where the 'bhava'nga theory' is developed as we have it today. Is
this accurate? Does anyone have references to the places it is used in the
Abhidhamma?

3. Is anyone aware of the approximate time the bhava'nga theory really started
developing in the way the Theravaada tradition understands it now?

Many thanks and metta,
Brett