This paper gives a closed approach to modeling and implementation with graphs. This approach uses extended entity relationship (EER) diagrams complemented with the Z-like constraint language GRAL. Due to the foundation of EER/GRAL on Z a common formal basis exists. EER/GRAL descriptions give conceptual models which can be implemented in a seamless manner by e cient data structures using the Gra...

We construct some separable infinite dimensional homogeneous Hilbertian operator spaces H ∞ and H m,L ∞ , which generalize the row and column spaces R and C (the case m = 0). We show that separable infinitedimensional Hilbertian JC∗-triples are completely isometric to an element of the set of (infinite) intersections of these spaces . This set includes the operator spaces R, C, R ∩ C, and the s...

If Z is a quotient of a subspace of a separable Banach space X, and V is any separable Banach space, then there is a Banach couple (A0, A1) such that A0 and A1 are isometric to X ⊕ V , and any intermediate space obtained using the real or complex interpolation method contains a complemented subspace isomorphic to Z. Thus many properties of Banach spaces, including having non-trivial cotype, hav...

Examples are given to show that two natural questions asked in [5] about complemented versions of James’s distortion theorems have negative answers.