Warning: Undefined array key "visitor_referer_type" in /var/www/vhosts/wordinf.com/core/app/libraries/Core.php on line 98 Richard Dedekind - The way in which the irrational...
The way in which the irrational numbers are usually introduced is based directly upon the conception of extensive magnitudes-which itself is nowhere carefully defined-and explains number as the result of measuring such a magnitude by another of the same kind. Instead of this I demand that arithmetic shall be developed out of itself.