Парные чайтасики

А причём тут этот корневой слог "āḥ" (т.е. даже не буква "а")?

На монетке более древний шрифт брахми. Описание монеты

У тхеравадинов есть такая четасика hadayavatthu - heart-base, место сознания. Я всё думал, что это такое. А там в примечаниях написано:

Т.е. в четасиках оказался синоним читты или рупы, я так и не понял.

“Granted that these two elements have as their support the derived matter consisting
of the heart-basis, how is it to be known that it is kamma-originated, has an invariable
function, and is to be found located in the heart? It may be said to be kamma-originated
because, like the eye, it is the materiality of a physical basis; and because of that it has
an invariable function; because it is the materiality of a physical basis and because it is
a support for consciousness, is the meaning. It is known that its location is there
because of the heart’s exhaustion (khijjana) in one who thinks of anything, bringing it
to mind intently and directing his whole mind to it” (Vism-mhþ 449–50).

Скорее всего упадая-рупани, наподобие опоры пяти индрий.  

Base это  алая

In the present life the bhavanga cittas take the maranàsannanimitta
of the immediate past life as their object. As this object
is not the new external object that appears in one of the sense
doors in the present life that gives rise to a cognitive series of
consciousness, we are not aware of it. So when we are asleep
or when we do not know anything, these bhavanga-cittas will
be arising and dissolving at a tremendous speed of more than
a thousand billion times per eye-wink.

As this object is not the new external object that appears in one of the sense
doors in the present life that gives rise to a cognitive series of
consciousness, we are not aware of it.