“…Among the fields which required such generalizations are the following topics: differential equations ( [31]), duality ([50], [54]...), evolution of domains ( [5], [6], [57], [58]), geometry ([34]- [36]), image reconstruction ( [29], [47], [49]), mechanics ([42], [51]), morphogenesis ( [5]), nonlinear analysis and optimization ( [2], [18], [25], [22]), shape optimization ( [1], [5], [11], [13], [24], [37], [27], [28], [62]), stochastic problems ( [45], [56]), viability and invariance ( [26], [59]). Several models exist: Cartesian squares, metric measure spaces ( [2], [21], [38], [39], [40]...), mutational spaces ( [5], [6], [26]- [28]...) and their variants ( [19]...) with various purposes.…”