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Using a definition of the (infinite-dimensional) Lie algebras introduced by Estabrook and Wahlquist (EW) that ‘lives’ directly on the jet bundle, we establish explicit methods to determine prolongations of these algebras to higher jet spaces, and calculate these prolongations for Burgers'...
We consider Kusuoka's construction of Dirichlet forms on the Vicsek snowflake. a nested fractal. His method is generalized and all irreducible, local Dirichlet forms which can be constructed in this way are characterized. We end up with a one-parameter family of different possible forms. This...
A theory of quaternion-valued hyperholomorphic functions (h.h.f.) is being developed which is closely related to the Maxwell equations for monochromatic electromagnetic fields. The main integral formulas are established, and some boundary-value properties are studied.
LetE(3) be the Lie group of proper rigid motions of Euclidean 3-space. The adjoint action ofE(3) on its Lie algebrae(3) induces an action on the Grassmannian of subspaces of given dimensiond. Projectively, these subspaces are the screw systems of classical kinematics. The authors show that...
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