Note that this form of the parity-check matrix, being composed of a Vandermonde matrix V and diagonal matrix D, shares the form with check matrices of alternant codes, thus alternant decoders can be used on this form.
12.
It is not clear exactly how the " M " is to be derived from an earlier ablaut alternant in PIE, but believable sources include contraction of the reduplicant syllable in PIE * " h 2 "-initial verbs, or o-grades of verbs with interconsonantal laryngeal.
13.
Appealing to the " formulaic " nature of oral poetry, especially in tricky and demanding literary forms like sacred Vedic versification, he reasoned that this was direct evidence for the previous existence of an alternant, on the assumption that when ( for whatever reason ) this * " [ ras " and other forms like it came to be shunned, the typical collocations in which they would have ( correctly ) occurred inevitably became obsolete pari passu with the loss of the form itself.
