A favourite prey species is the sanda or spiny-tailed lizard.

Eels unbed themselves and stir at the noise of thunder.

If necessary it would afterhand always be possible to integrate over larger time intervals.

One of the main reasons for the interest in convex envelopes is the fact that the set of global minimum points of f on S is contained in the set of global minimum points of conv_S(f) on S and the two minimum values coincide (see, e.g., [11, 17]). Hence, if the convex envelope were efficiently computable or available in closed form, one could replace the nonconvex problem of minimizing f on S with the convex problem of minimizing f on conv_S(f).