谔 諤 e4
honest speech

strokes 16
radical
讠
言
strokes after radical 9
薛定谔 薛定諤 xue1 ding4 e4
Erwin Schrödinger (1887-1961), Austrian physicist

薛定谔方程 薛定諤方程 xue1 ding4 e4 fang1 cheng2
Schrödinger's wave equation