Dear Alakendu Das,
First, may I suggest that you use the International Alphabet of Sanskrit Transliteration for writing Sanskrit words? This is what Indologists are accustomed to. Thus, your vigyan would be written as vijñāna.
As you noted in your query of Nov. 13, the meaning of vijñāna
in Buddhist texts somewhat differs from its meaning in Hindu texts. In both cases, the meaning of
vijñāna comes out in juxtaposition with jñāna. An article on this by Franklin Edgerton was published in 1933, "Jñāna and
vijñāna," drawing on Hindu texts. I have scanned my photocopy of it and attached a PDF of the scan.
Best regards,
David Reigle
Colorado, U.S.A.