The Chopin - Godowsky Revolutionary Etude No 12 is arranged for the left hand only, and we're only informed about this by a note under the title. Please see the excerpt below:
I am currently writing a piece for piano only for the left hand. I have only one staff with the treble clef for piano. Without any additional notes, we would play it with the right hand autonomously.
I would like to know if I, too, should just indicate to play the piece with the left hand only as in the excerpt above—or are there any other (notation) signs to show this?