◊ â ( A ) therefore represents ‘that’ which is the Absolute infinity or Omega, Ω of Cantor’s theory of Infinities . It is Brahman, the Unknown. It is the akśara ( Axar ), the indestructible or the â + swar ( A+svar ).
The following shlökas further underline the above assertions :-
Aitareya Ārāṇyaka II.3.6 
….â+kāraḥ vai sarvā vāk+sa+eṣā sparśaḥ ūṣma abhivyaḥ+ajyamānā . bavhī nānā rūpā bhavati. tasyai yadupāṅśu sa prāṇo atha, yad ucchaiḥ tat śarīraṁ, tasmāt tat tir iva tir iva hai+śarīraṁ+śarīro hi prāṇo atha, yad uccaiḥ tat śarīraṁ, tasmāt tad āvira āvirhi śariraṁ.
……. ‘a’ is the whole of speech and being manifested through the mutes and the sibilants it becomes manifold and various. If uttered in a whisper it is this prāṇa, if forcefully, that body – śarīra. Therefore it is hidden, as hidden as the previous body encapsulated in this prāṇa . But spoken forcefully it is that body and visible, for body is visible.
‘a’ ( A ) is a suffix in every sparśa or ‘mute consonant’ – i.e from kâ ( k ) to mâ ( ma ) and in the sibilants śâ, sâ, sâ, hâ ( Sa¸ Ya¸ sa¸ h ). This is a very interesting structure in Sanskrit. Now not only ‘a’ ( A ) is a suffix in every consonant of the alphabet and from there it pervades into every spoken word or sentence, thus it is also the symbol for Brahman, the Unknown……and this is precisely what is restated by Lord Kriśna in Gītā 10.33…
akśarānām â+kārah asmi dwandwah sāmāsikasya ca. aham eva
akśayah kālah dhātā aham viśwatomukhah . 10.33
I am the letter ‘a’ among the vowels of the alphabet and the dwanda compound in relation to the words collectively. I am indestructible time. I am the Dispenser facing everywhere.