We study the distribution of 2-plane elements on which infinitesimal parallel displacement of isovectors yields identity. This yields to an algebraic and differential classification and, in the generic case, to a quasimetric naturally associated with the field.
No takes yet. Share an insight, caveat, or question.
Helmuth K. Urbantke (1984) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: