Complex sentence: Erhard Schmidt (January 13,1876-December 6,1959) was a German mathematician born in Dorpat, Germany (now Tartu, Estonia) who is considered, together with David Hilbert, as one of the founders of modern abstract functional analysis.
Split into simpler sentences: Erhard Schmidt (January 13,1876-December 6,1959) was a German mathematician born in Dorpat, Germany (now Tartu, Estonia). Together with David Hilbert he is considered to be one of the founders of modern abstract functional analysis.