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A Complete Catalog of Geometrically Non-Is omorphic 18-run Orthogonal Ar rays
Orthogonal Ar rays Complete Catalog
2015/3/18
Factorial designs have w ide applications in industrial and scie ntific studies.
Traditionally, they are class ifie d based their combinatoric prop ertie s. Two
designs are considered to b e isomorp...
Conformal pure radiation with parallel rays
Pure radiation parallel rays pp–waves conformal geometry tractor calculus
2011/8/30
Abstract: We define pure radiation metrics with parallel rays to be n-dimensional pseudo-Riemannian metrics that admit a parallel null line bundle K and whose Ricci tensor vanishes on vectors that are...