How to compute fundamental frequency from a list of overtones?
Nope. Difference between overtones is a good point to start, i,e F3-F2, F2-F1. The differences should be all the same or multiple of each other. The smallest one is often the fundamental. It gets more tricky of the spectrum is "sparse", i.e. a lot of the harmonics are missing. Then you need to find a largest possible divisor that turns all frequencies into integers or, to be precise, so that the ratio of frequency to fundamental is within the measurement accuracy of the nearest integer.