A generalized Leibniz rule and foundation of a discrete quaternionic analysis
A high-order helicity invariant and the Rokhlin theorem
A problem about Feynman integrals on Riemannian manifolds
A quaternionic treatment of Navier-Stokes equations
Algebraic characterization of the dimension of differential spaces
All natural concomitants of vector valued differential forms
An application of principal bundles to coloring of graphs and hypergraphs
An interesting connection between the chromatic number of a graph and the connectivity of an associated simplicial complex , its “neighborhood complex”, was found by Lovász in 1978 (cf. L. Lovász [J. Comb. Theory, Ser. A 25, 319-324 (1978; Zbl 0418.05028)]). In 1986 a generalization to the chromatic number of a -uniform hypergraph , for an odd prime, using an associated simplicial complex , was found ([N. Alon, P. Frankl and L. Lovász, Trans. Am. Math. Soc. 298, 359-370 (1986; Zbl 0605.05033)],...