The diminished arpeggio consists of the root (1), minor third (m3) and diminished fifth (b5), corresponding to the notes A, C and E-flat. A fingering is formed from each of these notes, creating three positions called root position, 1st inversion (from the third) or 2nd inversion (from the fifth). To learn these fingerings, practice the diminished arpeggio exercise.
= Root 
Inversion Of The Diminished Arpeggio
The diminished arpeggio consists of the root (1), minor third (m3) and diminished fifth (b5), corresponding to the notes A, C and E-flat. A fingering is formed from each of these notes, creating three positions called root position, 1st inversion (from the third) or 2nd inversion (from the fifth). To learn these fingerings, practice the diminished arpeggio exercise.