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'''Thakkar Pheru''' ([[IAST]]: '''Ṭhakkura Pherū''') was an author of books on mathematics, coins, and gems in [[Delhi]]. He was active between 1291 and 1347.<ref>The Mathematics Student, Volumes 58-59, p. 247, [[Indian Mathematical Society]] (1990)</ref><ref>Sreeramula Rajeswara Sarma, trans., with introduction, Sanskrit chāyā and commentary, ''Ṭhakkura Pherūʼs Rayaṇaparīkkhā: A Medieval Prakrit Text on Gemmology'' (Aligarh: Viveka, 1984).</ref> | '''Thakkar Pheru''' ([[IAST]]: '''Ṭhakkura Pherū''') was an author of books on mathematics, coins, and gems in [[Delhi]]. He was active between 1291 and 1347.<ref>The Mathematics Student, Volumes 58-59, p. 247, [[Indian Mathematical Society]] (1990)</ref><ref>Sreeramula Rajeswara Sarma, trans., with introduction, Sanskrit chāyā and commentary, ''Ṭhakkura Pherūʼs Rayaṇaparīkkhā: A Medieval Prakrit Text on Gemmology'' (Aligarh: Viveka, 1984).</ref> | ||
[[Alauddin Khalji]] recruited Ṭhakkura Pherū, a [[Shrimal Jain]] from Kannāṇā (modern Kalpana) in [[Haryana]], as an expert on coins, metals and gems.<ref>Itihas ki Amarbel Oswal, Mangilal Bhutoria</ref> For the benefit of his son Hemapal, he wrote several books on related subjects including ''Dravyaparīkṣa'' in 1318 based on his experience at the master mint, and the ''Ratnaparikṣa'' (Pkt. ''Rayaṇaparikkhā'') in 1315 "having seen with my own eyes the vast collection of gems … in the treasury of [[Alauddin Khalji|Alāʾ al-Dīn Khaljī]]." <ref>Sreeramula Rajeswara Sarma, trans., with introduction, Sanskrit chāyā and commentary, ''Ṭhakkura Pherūʼs Rayaṇaparīkkhā: A Medieval Prakrit Text on Gemmology'' (Aligarh: Viveka, 1984): 21.</ref> He was continuously employed until the rule of [[Ghiyath al-Din Tughluq|Ghiasuddin Tughluq]].<ref>‘A Jain Assayer at the Sulṭān’s Mint’ in: Jayandra Soni (ed), Jaina Studies: Proceedings of the DOT 2010 Panel in Marburg, Germany, New Delhi, pp. 7-32.</ref> | [[Alauddin Khalji]] recruited Ṭhakkura Pherū, a [[Shrimal Jain]] from Kannāṇā (modern Kalpana) in [[Haryana]], as an expert on coins, metals and gems.<ref>Itihas ki Amarbel Oswal, Mangilal Bhutoria</ref> For the benefit of his son Hemapal, he wrote several books on related subjects including ''Dravyaparīkṣa'' in 1318 based on his experience at the master mint, and the ''Ratnaparikṣa'' (Pkt. ''Rayaṇaparikkhā'') in 1315 "having seen with my own eyes the vast collection of gems … in the treasury of [[Alauddin Khalji|Alāʾ al-Dīn Khaljī]]."<ref>Sreeramula Rajeswara Sarma, trans., with introduction, Sanskrit chāyā and commentary, ''Ṭhakkura Pherūʼs Rayaṇaparīkkhā: A Medieval Prakrit Text on Gemmology'' (Aligarh: Viveka, 1984): 21.</ref> He was continuously employed until the rule of [[Ghiyath al-Din Tughluq|Ghiasuddin Tughluq]].<ref>‘A Jain Assayer at the Sulṭān’s Mint’ in: Jayandra Soni (ed), Jaina Studies: Proceedings of the DOT 2010 Panel in Marburg, Germany, New Delhi, pp. 7-32.</ref> | ||
He is also known for his work on mathematics ''Ganitasārakaumudi''.<ref>http://www.srsarma.in/pdf/mybooks/mybooks_reviews/R_GSK_Ikeyama.pdf</ref> | He is also known for his work on mathematics ''Ganitasārakaumudi''.<ref>http://www.srsarma.in/pdf/mybooks/mybooks_reviews/R_GSK_Ikeyama.pdf</ref> | ||