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IHEP 2005 - 19 (In English) | |
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| A.I. Kurnosenko | ||
| Around Vogt's Theorem | ||
| Protvino, 2005. – p. 32, figs. 19, refs.: 15. | ||
Vogt's theorem, concerning boundary angles of a convex arc with monotonic curvature (spiral arc ), is taken as a starting point to establish basic properties of spirals. The theorem is expanded by removing requirements of convexity and curvature continuity; the cases of inflection and multiple windings are considered. Positional restrictions for a spiral arc with two given curvature elements at the endpoints are established, as well as the necessary and sufficient conditions for the existence of such spiral.
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