Klengel Technical Cello Studies Vol. 1, Triads through three octaves.
I'm referring to two separate symbols. I looked here but nothing really matches.
First is the 0 with the dash beneath it. At first I thought open with harmonic but that doesn't seem right since I cannot find a convenient harmonic on the A string.
Second is the roman numerals. On violins those would represent string so I suspect it does here as well. It seems to be correlated with the 0 symbol as well which strengthens the idea in my mind that it represents harmonics. I am however not sure. Also the little a adds to the confusion since I don't remember seeing that anywhere before except for figured bass or something.
What are the symbols called? Where can I find precise information on how to play then. I'll be seeing my teacher again in a few weeks however I don't want to wait that long before I can practice arpeggios.