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Centers of curvature of a curve
shape will be the evolute of that curve. The evolute of a circle is therefore a single point at its center. Equivalently, an evolute is the envelope of
Evolute
Private organization in the Netherlands
The Evolute Institute is a private organization based in the Netherlands[where?] that offers programs combining legal psychedelic retreats (notably
Evolute_Institute
Curve traced by a string as it is unwrapped from another curve
as the string is either unwrapped from or wrapped around the curve. The evolute of an involute is the original curve. It is generalized by the roulette
Involute
Curve generated by rolling a circle inside another circle with 4x or (4/3)x the radius
used), cubocycloid, and paracycle. It is nearly identical in form to the evolute of an ellipse. If the radius of the fixed circle is a then the equation
Astroid
Plane curve; an epicycloid with radii differing by 1/2
\varphi +\cos 3\varphi ,3\sin \varphi +\sin 3\varphi )} (see above). The evolute of a curve is the locus of centers of curvature. In detail: For a curve
Nephroid
Type of plane curve
of the circle k {\displaystyle k} , one gets a limaçon of Pascal. The evolute of a curve is the locus of centers of curvature. In detail: For a curve
Cardioid
On points of extreme curvature in curves
correspond to the cusps of its evolute, the curve formed by the centers of curvature of the given curve. Thus, the evolute of any smooth closed curve has
Four_vertex_theorem
Genus of molluscs (fossil)
type genus for the Euomphaloceratinae by Cooper, 1978. The shell is very evolute, all whorls exposed, and rather depressed, with prominent umbilical and
Euomphaloceras
Extinct subclass of cephalopod molluscs
Anahoplites). Where it does not cover those preceding, the specimen is said to be evolute (e.g., Dactylioceras). A thin living tube called a siphuncle passed through
Ammonoidea
Surface able to be flattened without distortion
analogous to the concept of the evolute in plane curves, although note that in the plane, there is only one evolute per curve, but in space there in
Developable_surface
1673 book on pendular motion by Christiaan Huygens
pendulum. These and other results led Huygens to develop his theory of evolutes and provided the incentive to write a much larger work, which became the
Horologium_Oscillatorium
Radius of the circle which best approximates a curve at a given point
An ellipse (red) and its evolute (blue). The dots are the vertices of the ellipse, at the points of greatest and least curvature.
Radius_of_curvature
Curve traced by a point on a rod as one end is dragged along a line
Mamikon's theorem. The envelope of the normals of the tractrix (that is, the evolute of the tractrix) is the catenary (or chain curve) given by y = a cosh x/a
Tractrix
Subcompact sedan
Aeolus A60 EV (electric version) Aeolus E70 (facelift electric version) Evolute i-Pro (Russia) Production 2011–present Model years 2012–present Assembly
Aeolus_A60
Dutch mathematician and physicist (1629–1695)
amount of dispersion. As a mathematician, Huygens developed his theory of evolutes and wrote on games of chance and the problem of points in Van Rekeningh
Christiaan_Huygens
Concept in Hindu philosophy
mahat is a concept in the Samkhya philosophy of Hinduism. It is the first evolute of Prakriti, the causeless cause of the world, that is generated after
Mahat-tattva
Curve generated by the projections of a fixed point on the tangents of another curve
the curve and the envelope of such normals is its evolute. Therefore, YR is tangent to the evolute and the point Y is the foot of the perpendicular from
Pedal_curve
Circle of immediate corresponding curvature of a curve at a point
curvature, form another curve, called the evolute of C. Vertices of C correspond to singular points on its evolute. Within any arc of a curve C within which
Osculating_circle
Extinct order of molluscs
overwhelmingly produced planospirally coiled discoidal shells that may be evolute with inner whorls exposed or involute with only the outer whorl showing
Ceratitida
Genus of molluscs (fossil)
restricted to the Triassic period. As common to the family, the shell is evolute with lateral tubercles. The suture is not elaborate. Arkel et al., Mesozoic
Balkanites
Genus of molluscs (fossil)
in the Middle Triassic of the Himalaya. The shell is thinly discoidal, evolute, and smooth; cross section highly compressed; venter narrowly rounded except
Ananorites
Extinct genus of molluscs
the living Nautilus. Stroboceras is characterized by a loosely coiled evolute shell bearing prominent longitudinal ridges and grooves; with a variable
Stroboceras
Genus of molluscs (fossil)
Calycoceras as the subgenus Calycoceras (Conlinocras), is a strongly ribbed, evolute ammonite, belonging to the acanthoceratid subfamily Acanthoceratinae, known
Conlinoceras
Extinct genus of nautiloids
only part of the body chamber divergent from the previous whorl. Shell evolute, expanding fairly rapidly; umbilicus open, perforate; whorl section ovoid
Asymptoceras
Genus of molluscs
Palembang shales of Sumatra. The eggcase of this species is considerably more evolute than that of Argonauta, possessing an open umbilical region, and seems
Kapal
Point of extreme curvature on a curve
typically only have 3-point contact with their osculating circle. The evolute of a curve will generically have a cusp when the curve has a vertex; other
Vertex_(curve)
Genus of molluscs (fossil)
from the Lower Jurassic with coarsely ribbed rounded whorls. The shell is evolute, early whorls a barrel-shaped cadicone, later become serpenticonic. Jurassic
Aegoceras_(Beaniceras)
Genus of molluscs (fossil)
The shell, which grew to be rather large, is evolute, strongly and sharply ribbed. Ribbing is both simple and biplicate, with primary ribs bifurcating
Glottoptychinites
Spiral with constant distance from itself
contribution from Mikhail Gaichenkov). As the Archimedean spiral grows, its evolute asymptotically approaches a circle with radius |v|/ω. Sometimes the term
Archimedean_spiral
Extinct suborder of ammonites
loosely coiled, evolute and gyroconic shells in which the sutural element are said to have complex moss-like endings. Shells are generally evolute, with all
Lytoceratina
Genus of molluscs (fossil)
and parts of Europe. The shell of Gastrohoplites is variably involute to evolute. Sides and venter are flat, shoulders sharp. Ribs more or less prominent
Gastrohoplites
the subfamily Xipherceratinae. Whorls are strongly depressed, but still evolute in coiling. The early growth state is prolonged, and smooth, followed by
Bifericeras
Cubic plane curve
between the origin and point (4,8), one gets the arc length 9.073. The evolute of the parabola ( t 2 , t ) {\displaystyle (t^{2},t)} is a semicubical
Semicubical_parabola
Genus of molluscs (fossil)
Neocardioceras is a genus of evolute acanthoceratid ammonites from the uppermost Cenomanian, Upper Cretaceous, of Europe, western U.S. and Brazil. As
Neocardioceras
Genus of molluscs (fossil)
stage of the Early Jurassic. The shell of Fuciniceras is generally small, evolute, and strongly ribbed. Sepkoski, Jack (2002). "A compendium of fossil marine
Fuciniceras
Center of the circle which best approximates a curve at a given point
locus of centers of curvature for each point on the curve comprise the evolute of the curve. This term is generally used in physics regarding the study
Center_of_curvature
Genus of molluscs (fossil)
of genera like Monophyllites and Ussurites. The shell of Eophyllites is evolute, discoidal; whorls compressed, deeply embracing; flanks gently convex,
Eophyllites
Type of plane curve
(red) and its evolute (blue), the locus of its centers of curvature. The four marked vertices of the ellipse correspond to the four cusps of the evolute.
Convex_curve
Genus of molluscs (fossil)
Kosmoceras is a moderately evolute ammonite genus from the upper Callovian (Middle Jurassic) of Europe with a simple aperture and irregular ribbing interrupted
Kosmoceras
Curve traced by a point on a rolling circle
epicycloids, and hypocycloids have the property that each is similar to its evolute. If q is the product of that curvature with the circle's radius, signed
Cycloid
Genus of molluscs (fossil)
media related to Arnioceras. Arnioceras is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled
Arnioceras
Genus of molluscs (fossil)
Flemingites is an extinct genus of evolute, ceratitic ammonoid from the Smithian portion of the Olenekian age (Lower Triassic Period) with spiral ridges
Flemingites
Genus of molluscs (fossil)
superfamily Xenodiscaceae. Doulingo""ceras produced a narrowly discoidal evolute shell with concave sides, a narrowly rounded rim (venter) that bears several
Doulingoceras
Perisphinctidae and superfamily Perisphinctaceae, is small, compressed, evolute, with long secondary ribs and very large asymmetric spatulate lappets that
Cleistosphinctes
Genus of molluscs (fossil)
inside of the whorls, unusual for ammonoids. Clymenia has a closely coiled evolute shell that may be faintly ribbed. The dorsum, on the inside of the whorl
Clymenia_(ammonite)
Genus of molluscs (fossil)
Sinemurian stage of the lower Jurassic, found in Europe. The shell is evolute, compressed in section. Inner whorls are smooth, outer mature whorl develops
Dasyceras
incomplete, crushed specimen from the Permian of China. Its shell is very evolute, with an hexagonal whorl section, and six rows of tubercles, in pairs on
Hexagonites
Extinct genus of molluscs
Mississippian of North America (Michigan) and Europe. The shell of Maccoyocerasis evolute, volutions only slightly impressed, whorl section hexagonal. Venter flattened
Maccoyoceras
Points with more than one closest boundary point
An ellipse (red), its evolute (blue), and its medial axis (green). The symmetry set, a super-set of the medial axis, is the green and yellow curves. One
Medial_axis
Compact crossover SUV
Lamari Eama (Iran) Cirelli 5 (Italy) Cirelli 5zero5 (Italy) EVO 6 (Italy) Evolute i‑SKY (Russia) Production 2020–present Assembly China: Liuzhou (Dongfeng
Forthing_T5_Evo
Genus of molluscs (fossil)
Berriasella is a discoidal evolute perisphinctacean ammonite, and type genus for the neocomitid subfamily Berriasellinae. Its ribbing is distinct, consisting
Berriasella
Plane curve traced by a point on a circle rolled around another circle
one cusp is a cardioid, two cusps is a nephroid. An epicycloid and its evolute are similar. Assuming that the position of p {\displaystyle p} is what
Epicycloid
Method for representing the local symmetries of a curve
corresponding to vertices of the curve. Such points will lie at cusp of the evolute. At such points the curve will have 4-point contact with the circle. For
Symmetry_set
Term for space or æther
category encompassing the Samkhya-Yoga and Vedanta, views Akasha as an evolute of something else. The third category regards Akasha as a mental concept
Akasha
Genus of molluscs (fossil)
family Hildoceratidae. The shells are characterized by a narrow discoidal evolute shape, keeled venter, concave ribs along the outer flanks, and a shallow
Hildoceras
Extinct genus of molluscs
the arietitid subfamily Asteroceratinae. The shell of Aegasteroceras is evolute with curve forward and meet at a broad low ventral keel. Aegasteroceras
Aegasteroceras
If a smooth plane curve has monotonic curvature, then its osculating circles are nested
of the evolute, the curve traced out by the centers of osculating circles. For curves with monotone curvature, the arc length along the evolute between
Tait–Kneser_theorem
Battery electric compact crossover SUV
Manufacturer Dongfeng Nammi Also called Dongfeng Vigo (other overseas markets) Evolute i-JOY (Russia, second generation) Production 2025–present Assembly China:
Nammi_06
Suborder of cephalopods
includes the living Nautilus. The Nautilidae are involute or slightly evolute and generally smooth with straight to sinuous sutures. The Cymatoceratidae
Nautilina
Extinct genus of molluscs
Europe and possibly Borneo. Xipheroceras, named by Buckman, 1911, has an evolute shell, all whorls clearly exposed, only very slightly impressed dorsally
Xipheroceras
Genus of molluscs (fossil)
Collignociceras is a strongly ribbed and tuberculate, evolute ammonite from the Turonian of the western U.S. and Europe belonging to the ammonitid family
Collignoniceras
Extinct order of molluscs
Campbelloceras, Tarphyceras, and Trocholites, are tightly coiled, but evolute with all whorls showing. The body chamber of tarphycerids is typically
Tarphycerida
Extinct suborder of ammonites
and symmetrical from side to side. They come in various forms, including evolute shells where all whorls are exposed, and strongly involute shells with
Ammonitina
1999 film by George Lucas
light forces are locked in an eternal battle while being two sides (or evolutes) of the same "Force", the force of time itself (Zurvan)—the prime mover
Star Wars: Episode I – The Phantom Menace
Star_Wars:_Episode_I_–_The_Phantom_Menace
Genus of molluscs (fossil)
cephalopods were fast-moving nektonic carnivores. Shells of Lytoceras are evolute, round or quadrate in section, covered with crinkled growth lines or riblets
Lytoceras
Extinct genus of ammonites
Hungary and probably also in Austria. Ammonites belonging to this genus have evolute shells of small size. Inner whorls are cadicone, while outer whorls are
Septimaniceras
Genus of molluscs (fossil)
been found in the Alps, Sicily, and possibly in California. The shell is evolute and ribbed, with the outer whorls becoming smooth. Arnioceltities is included
Arnioceltites
Extinct family of ammonites
ammonites from Europe, North Africa, and Asia characterized by narrow, evolutely coiled shells, usually with coarse ventral ribbing on the body chamber
Juraphyllitidae
Genus of molluscs
order Ceratitida, included in the family Megaphyllitidae that produced evolute compressed planispiral shells with rounded venters, inner whorls ornamented
Dobrogeites
Plane curve
locus of all the centers of curvature is called an evolute. In the case of an ellipse, the evolute is an astroid. Ellipses appear in triangle geometry
Ellipse
Extinct superfamily of ammonites
lobes are smooth and undivided. Shells are variable in form, both ribbed, evolute forms and smooth, involute forms are included. Families regarded as part
Hoplitoidea
Muniericeratidae, a family of Upper Cretaceous ammonites characterized by moderately evolute shells with strong sinuous ribs that have tubercles on the shoulders and
Fournierella_(cephalopod)
Benacoceras is a strongly ribbed, evolute ammonite from the Late Jurassic, coiled so that all whorls are exposed. Ribbing is biplicate, with very short
Benacoceras
Family of single-celled organisms
included genera are characterized by asymmetrical, semi-involute to partially evolute, aragonitic tests consisting of an undivided planispiral or trochospiral
Planispirillinidae
a surface in three dimension the focal surface, surface of centers or evolute is formed by taking the centers of the curvature spheres, which are the
Focal_surface
Genus of nautiloid cephalopods
xaizangense Chen resembles the ophidioceratid genus Ophioceras. The shell is evolute, discoidal, serpenticonic; whorl section rounded, covered with thick, straight
Xainzanoceras
Genus of molluscs (fossil)
which Austroceratites is placed, is a mid Triassic family that has left evolute to involute, stoutly ribbed, discoidal shells with ceratitic sutures. Austroceratites
Austroceratites
Genus of molluscs (fossil)
between about 295 and 290 million years ago. The shell of Atsabites is evolute, discoidal; whorls slightly impressed dorsally, with numerous prominent
Atsabites
Genus of molluscs (fossil)
Aulacostephanidae. Aulacostephanus produced a discoidal, strongly ribbed, evolute shell of moderate size, reaching diameters of 16 cm (~6.5in.), or so. Ribs
Aulacostephanus
Extinct family of nautiloids
in the Alps, on Spitsbergen, in India and Japan has a rapidly expanding evolute shell with a perforate umbilicus and suboval whorl section. The suture
Syringonautilidae
Viviani's curve Caustic including Catacaustic and Diacaustic Cissoid Conchoid Evolute Glissette Inverse curve Involute Isoptic including Orthoptic Negative pedal
List_of_curves
Swiss mathematician (1655–1705)
y'=p(x)y+q(x)y^{n}.} Jacob Bernoulli also discovered a general method to determine evolutes of a curve as the envelope of its circles of curvature. He also investigated
Jacob_Bernoulli
Genus of molluscs (fossil)
Danubitoidea. The Badiotitidae is included in the Ceratitoidea. Badiotites is evolute, compressed, and discoidal, with sigmoidal ribs, an acutely rounded venter
Badiotites
triangle Caustic including Catacaustic and Diacaustic Cissoid Conchoid Evolute Glissette Inverse curve Involute Isoptic including Orthoptic Orthotomic
List_of_mathematical_shapes
which is part of the ammonitid superfamily Eoderoceratoidea. Shells are evolute with an open umbilicus; strongly ribbed, ribs flattened on the venter,
Promicroceras
Genus of molluscs (fossil)
genus of the clydonitoidean family Clionitidae, and its type. The shell is evolute so as to expose all whorls which are covered with generally bifurcating
Clionites
Extinct family of molluscs
Middle and Upper Permian genera characterized by compressed, discoidal, evolute shells with rounded to acute venters and commonly with lateral ribs. Sutures
Xenodiscidae
Family of molluscs
varied genus that makes up the Jurassic Cenoceras complex. Cenoceras is evolute to involute, and globular to lentincular; with a suture that generally
Nautilus
Genus of molluscs (fossil)
the Valanginian,(Lower Cretaceous), of Argentina. Frenguelliceras has an evolute, flat sided shell with coarse, simple or widely splayed ribs dividing from
Frenguelliceras
Extinct genus of molluscs
lived during the Jurassic period, from 155.7 to 150.8 Ma. The shell is evolute, strongly ribbed and moderately umbilicate. Primary ribs, on the order
Ataxioceras
Extinct genus of nautiloids
Carboniferous (Pennsylvanian) and Permian, the shell of which is moderately evolute with a subquadrate whorl section, bearing nodes on the ventral or umbilical
Metacoceras
Genus of molluscs (fossil)
Late Ordovician. Charactoceras has a closely coiled, rapidly expanding evolute shell, dorsally impressed, with a flattened venter and rounded sides. Sutures
Charactoceras
Curve traced by a point on a circle rolling within another circle
an epicycloid with k cusps moves snugly inside one with k+1 cusps. The evolute of a hypocycloid is an enlarged version of the hypocycloid itself, while
Hypocycloid
Genus of molluscs (fossil)
Switzerland, the United Kingdom, United States and Canada. Aspidoceras has an evolute shell with quadrate-rounded or depressed whorls that have two rows of tubercles
Aspidoceras
Normannites is a strongly ribbed evolute Middle Jurassic genus of ammonite included in the stephanoceratoid family Stephanoceratidae. Normanites was previously
Normannites
Genus of molluscs (fossil)
ceratitoidean family Tirolitidae of the order Ceratitida, characterized by a flat, evolute shell with moderately compressed, rounded whorls. The spinose stage characteristic
Biltnerites
Extinct family of ammonites
ammonites in the order Ammonitida. They have a shell morphology that is mostly evolute, typically with biplicate, simple, or triplicate ribbing. Large forms have
Perisphinctidae
Genus of molluscs (fossil)
sutures and variably subglobular to compressed, ribbed or smooth, generally evolute shells. Arctoptychites Paleodb Treatise on Invertebrate Paleontology, Part
Arctoptychites
Extinct superfamily of nautiloids
Trigonoceratidae, type family, named by Hyatt, 1884, are loosely coiled to evolute, with oval to subquadrate, compressed to depressed whorl sections, and
Trigonoceratoidea
Extinct genus of molluscs
sometimes split into at least three subgenera. Cheiloceras (Cheiloceras) has evolute juvenile stages, the umbilicus closing later, while C. (Compactoceras)
Cheiloceras
EVOLUTE
EVOLUTE
EVOLUTE
EVOLUTE
Surname or Lastname
English and French
English and French : from the Middle English, Old French personal name Crispin, Latin Crispinus, a family name derived from crispus ‘curly-haired’ (see Crisp). This name was especially popular in France in the early Middle Ages, having been borne by a saint who was martyred at Soissons in ad c. 285 along with a companion, Crispinianus (whose name is a further derivative of the same word).English and French : diminutive of Crisp.
Surname or Lastname
Dutch and German
Dutch and German : nickname for a thin man, Middle Dutch, Middle High German mager. This name also occurs frequently in western Slavic countries, especially Bohemia and Poland.English : variant of Major.Czech : ethnic name for a Hungarian (see Magyar).
Surname or Lastname
English
English : variant spelling of Carras.Dutch : from a reduced form of the Greek personal name Makarios (see Macario).Americanized spelling of German Karas, Gareis, or Gehres.
Boy/Male
American, British, English
Old and Wise Protector; From the Elves Valley
Boy/Male
Biblical
The Lord is judge.
Girl/Female
Irish
Meaning “fruitful, bountiful.†In legend, Daireann, a beautiful young woman, fell in love with Fionn Mac Cool (read the legend), a man with many wives. She asked to be his only wife for a year – and then to have the half of his time after that.
Boy/Male
Hindu
Devoted to pleasing
Boy/Male
Tamil
Lover
Boy/Male
Indian, Punjabi, Sikh
Kind Love
Male
Spanish
Spanish form of Latin Leontius, LEONCIO means "lion-like."
EVOLUTE
EVOLUTE
EVOLUTE
EVOLUTE
EVOLUTE
n.
A curve from which another curve, called the involute or evolvent, is described by the end of a thread gradually wound upon the former, or unwound from it. See Involute. It is the locus of the centers of all the circles which are osculatory to the given curve or evolvent.
n.
The involute of a curve. See Involute, and Evolute.
n.
A curve traced by the end of a string wound upon another curve, or unwound from it; -- called also evolvent. See Evolute.
n.
The formation of an involute by unwrapping a thread from a curve as an evolute.