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Wichita State University: Takakazu Seki Kowa (1642 1708)
This site provides a general biography of Takakazu Seki Kowa, "the arithmetical sage." Content focuses on his known accomplishments. Also includes related links.
University of St. Andrews (UK)
University of St. Andrews: Takakazu Seki Kowa
The University of St. Andrews offers this biography of Takakazu Seki Kowa. Many interesting links are provided.