Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap%26ss.244..375p&link_type=abstract
Astrophysics and Space Science, Volume 244, Issue 1-2, pp. 375-385
Astronomy and Astrophysics
Astrophysics
Scientific paper
A local geometric construction is proposed on thepartially ordered set of instantsI. A totally ordered subsetC(I)⊂I is assumed to have 3-dimensional affine coordinate structure,without a specified metric, called the τ-space ofC(I). Guided by a strong analogy with analytical mechanics theT-configuration space (θ, τα), θ a real parameter, is constructed where-upon the usual Hamilton-Jacobi theory establishes a simple geometrical construction, viz., the complete figure from the calculus of variations. The duration function, dur:C(I)→R is associated withtemporally equidistant hypersurfaces through which pass a congruence of extremal curves to the fundamental integral.
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