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'''Georg Cantor''' (1845-1918) was a [[Russian]]-[[German]]<ref>Cantor's mother was a Russian [[Roman Catholic Church|Catholic]], while his father was a German [[Protestant]]; Cantor was born in Russia but moved to Germany, where he was never comfortable, as a boy.</ref> [[mathematician]] who is considered one of the greatest ever because he created the field of [[Set theory|Set Theory]].<ref>Cantor's founding of Set Theory was in several papers he wrote between 1874 and 1897.</ref>  '''''His motivation was to understand the [[Christian]] concept of [[eternity]]'''''.  He dedicated his last publication to a passage from [[1 Corinthians (Translated)|1 Corinthians]]:  "The time will come when these things which are now hidden from you will be brought into the light."<ref>http://www.acmsonline.org/Dauben-Cantor.pdf</ref>   

'''Georg Cantor''' (1845-1918) was a [[Russian]]-[[German]]<ref>Cantor's mother was a Russian [[Roman Catholic Church|Catholic]], while his father was a German [[Protestant]]; Cantor was born in Russia but moved to Germany, where he was never comfortable, as a boy.</ref> [[mathematician]] who is considered one of the greatest ever because he created the field of [[Set theory|Set Theory]].<ref>Cantor's founding of Set Theory was in several papers he wrote between 1874 and 1897.</ref>  '''''His motivation was to understand the [[Christian]] concept of [[eternity]]'''''.  He dedicated his last publication to a passage from [[1 Corinthians (Translated)|1 Corinthians]]:  "The time will come when these things which are now hidden from you will be brought into the light."<ref>http://www.acmsonline.org/Dauben-Cantor.pdf</ref>   

Cantor's work is an example of the [[best of the public]], as he never lectured at a university and was even vilified by several leading mathematicians of his time, such as [[Henri Poincare]].  Yet Cantor's revolutionary work proved to be the most influential of all, and David Hilbert praised Cantor as the greatest mathematician since before [[Leonard Euler]].  Hilbert declared, "No one shall expel us from the paradise that Cantor has created for us."

Cantor's work is an example of the [[best of the public]], as he never lectured at a university and was even vilified by several leading mathematicians of his time, such as [[Henri Poincare]].  Even some theologians opposed Cantor for the implications of his work in understanding the nature of [[God]].  Yet Cantor's revolutionary work proved to be the most influential of all, and David Hilbert praised Cantor as the greatest mathematician since before [[Leonard Euler]].  Hilbert declared, "No one shall expel us from the paradise that Cantor has created for us."

'''''Cantor was the first to "put [[infinity]] on a firm logical foundation."'''''<ref name="Cantor bio">http://scidiv.bellevuecollege.edu/Math/infinity.html</ref>  His invention of set theory helped him achieve this extraordinary goal.<ref>http://www.engr.iupui.edu/~orr/webpages/cpt120/mathbios/gcant.htm</ref>  He "described a way to do arithmetic with infinite quantities useful to mathematics."<ref name="Cantor bio"/>  Cantor showed that there are "infinite sets of different sizes, some of which are countable and some of which are uncountable."<ref>http://www.storyofmathematics.com/19th_cantor.html</ref>

'''''Cantor was the first to "put [[infinity]] on a firm logical foundation."'''''<ref name="Cantor bio">http://scidiv.bellevuecollege.edu/Math/infinity.html</ref>  His invention of set theory helped him achieve this extraordinary goal.<ref>http://www.engr.iupui.edu/~orr/webpages/cpt120/mathbios/gcant.htm</ref>  He "described a way to do arithmetic with infinite quantities useful to mathematics."<ref name="Cantor bio"/>  Cantor showed that there are "infinite sets of different sizes, some of which are countable and some of which are uncountable."<ref>http://www.storyofmathematics.com/19th_cantor.html</ref>