János Horváth may refer to:
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János Horváth (politician) (1921 – 2019), Hungarian-American economist and politician
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John Horvath (mathematician)
John Michael Horvath (born János Horváth; 30 July 1924 in Budapest – 12 March 2015) was a Hungarian-American mathematician noted for his contributions to analysis especially in functional analysis and distribution theory. - (born János Horváth in 1924 – died 2015), Hungarian-American mathematician
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