- evolute and involute
- Смотри Эволюта и эвольвента.
Энциклопедический словарь по металлургии. — М.: Интермет Инжиниринг. Главный редактор Н.П. Лякишев. 2000.
evolute and involute
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Evolute — In the differential geometry of curves, the evolute of a curve is the locus of all its centers of curvature. Equivalently, it is the envelope of the normals to a curve. The original curve is an involute of its evolute. (Compare and… … Wikipedia
Involute — In the differential geometry of curves, an involute of a smooth curve is another curve, obtained by attaching an imaginary taut string to the given curve and tracing its free end as it is wound onto that given curve; or in reverse, unwound. It is … Wikipedia
involute — adj. & n. adj. 1 involved, intricate. 2 curled spirally. 3 Bot. rolled inwards at the edges. n. Geom. the locus of a point fixed on a straight line that rolls without sliding on a curve and is in the plane of that curve (cf. EVOLUTE). Etymology:… … Useful english dictionary
Эволюта и эвольвента — [evolute and involute] понятия дифференциальной геометрии: множество центров кривизны плоской кривой называется эволютой этой кривой; кривая по отношению к своей эволюте называется эвольвентой … Энциклопедический словарь по металлургии
Trigonocerataceae — Temporal range: U Devonian U Triassic Scientific classification Kingdom: Animalia Phylum: Mollusca Class … Wikipedia
Pedal curve — Geometric construction of the pedal of C with respect to P In the differential geometry of curves, a pedal curve is a curve derived by construction from a given curve (as is, for example, the involute). Let C be a given curve and P a fixed point… … Wikipedia
Nautilus — For other uses, see Nautilus (disambiguation). Nautilus Temporal range: Triassic–Present[1] … Wikipedia
Centroceratidae — Temporal range: M Devonian L Permian Scientific classification Kingdom: Animalia Phylum: Mollusca Class … Wikipedia
Nautilina — Temporal range: Late Triassic Recent Scientific classification Kingdom: Animalia Phylum: Mollusca Class … Wikipedia
Cravenoceratidae — Scientific classification Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda … Wikipedia
