Which of those that discovered Runge's phenomenon  was a German mathematician, physicist, and spectroscopist.?
Runge's phenomenon:  It was discovered by Carl David Tolmé Runge (1901) when exploring the behavior of errors when using polynomial interpolation to approximate certain functions. Carl David Tolmé Runge: Carl David Tolmé Runge (] ; 30 August 1856 – 3 January 1927) was a German mathematician, physicist, and spectroscopist.
i don't know