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Tamal Maharaj

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Preprint Sep 2026

Quaternary Preparata codes are quasi-perfect covering codes in the Hamming metric

The quaternary Preparata codes of Hammons, Kumar, Calderbank, Sloane and Sol\'e are $\mathbb{Z}_4$-linear codes of length $2^m$ with $4^{2^m-m-1}$ codewords. They are usually studied through their binary Gray images, that is, in the Lee metric. We consider them instead as codes over a 4-letter alphabet with the Hamming...

Tamal Maharaj · 0 citations
#natural language process... Preprint Jul 2026

Viveka-Insight: a cross-lingual concept graph and citation-grounded retrieval resource over the complete works of Swami Vivekananda in English and Bengali

Viveka-Insight, a bilingual resource and open-source pipeline for the works of Swami Vivekananda, is presented, with known-item cross-lingual retrieval over 194 verified rendered lecture pairs and a 30-question audit of citation integrity and modern-question bridging.

Tamal Maharaj · 0 citations

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