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By Constantin Udriste, Ionel Tevy. He received his PhD in Mathematics from the University Babes-Bolyai of Cluj-Napoca, Romania. Ionel Tevy, PhD, is a Professor of Mathematics at the University Politehnica of Bucharest, Romania.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.