With respects to the emergy evaluation of complexity, information and technology

Ulgiati et al. recently stated that, "The optimum efficiency "chosen" by green plants maximizes their biomass over time within the existing constraints". This appears to be a statement about the evolution of systems which operate under a selective maximization principle, such that given X constraints, plants select Y efficiencies that maximize their biomass - a "maximum biomass optimum efficiency principle". If we use UBiomass to notate the biomass form of energy, and combine this with notation, nmax, which Tribus used to express the optimum efficiency for maximization, the maximum biomass optimum efficiency principle might be designated ?(UBiomass)max. In their article Ulgiati et al. also identified two other selective maximization principles: maximum power, n(P)max, and maximum empower, n(emP)max. However, it is not clear to me how these three principles relate to one another. I would therefore like to ask Ulgiati et al. to indicate which one of the following relations holds. [Graphic missing] If none of the above four relations hold, given that they are all maximization principles which have at various times been touted as baring some relation to evolutionary system selection, it would be of benefit for Ulgiati et al. to indicate how these principles are in fact related.