At the beginning of every book, there is the name of the author followed by the title itself. However, the case, in which the author's name is written may vary. Let me illustrate with two examples:
- Ioannis Kepleri Harmonices Mundi, which is the genitive, and
- Carolo F. Gausso Disquisitiones arithmeticae, which is (probably) the ablative.
My theory is that the first example means The Harmony of the World of Johannes Kepler, but the second is Arithmetical investigations by C. F. Gauss. Is this correct?
And is there some "righter" option, or can you use both? My guess would be that both are possible, but the ablative case seems to be much more frequent.