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戴德金(Julius Wilhelm Richard Dedekind),德國不倫瑞克人,一八三一年十月六日生。肄業哥廷根大學,為高斯門生。一八五二年得博士銜。好交友,然畢身鰥居。立理想論,議戴德金環,啟以代數究數論、幾何之先。友康托爾,助其力抗克羅內克,以揚集論。立戴氏切割,嚴定實數之義;嘗以公理系統論自然數,奠皮亞諾公理之基。一九一六年二月十二日卒,年八十五。
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