X-Nico

unusual facts about convex


Convex-tailed horned toad

The convex-tailed horned toad (Xenophrys caudoprocta) is a species of amphibian in the Megophryidae family, endemic to China, and is only known from the type locality, Tianping Mountain, Sangzhi County, in Hunan.


Aglais ladakensis

Differs from Aglais kaschmirensis with the forewing termen convex and not falcate and not produced between veins 5 and 6.

Bavette

Bavette (pasta), a type of ribbon pasta noodle, similar to Spaghetti, that has a flat section and a slightly convex shape

Berlin Gold Hat

The Berlin gold hat is a 490 g gold hat with a long and slender conical shaft and a differentiated convex foot, decorated all over with traced motifs, applied with small stamps and wheels.

Context of computational complexity

For example, Chan's algorithm can compute the convex hull of a set of points in O(n log h) time, where n is the number of points in the input and h is the number of points in the resulting convex hull, a subset of the input points.

Convex geometry

Although the first known contributions to convex geometry date back to antiquity and can be traced in the works of Euclid and Archimedes, it became an independent branch of mathematics at the turn of the 19th century, mainly due to the works of Hermann Brunn and Hermann Minkowski in dimensions two and three.

Death in Five Boxes

The doctor is carrying four wrist watches; a beautiful dealer in art is carrying a bottle of quicklime and another of phosphorus; and the owner of the Anglo-Egyptian Importing Company is carrying the ringing mechanism of an alarm clock and a convex piece of glass.

Dominican Church, Vienna

The gilded concave-convex balustrade of the rood loft is a typical example of the transition between Baroque and Rococo.

Elisa Rego

Also found in the repertoire of this work-musical themes as: "La Gata Bajo La Lluvia" (The Cat Under Rain) by Rocio Durcal, "Cóncavo Y Convexo" (Concave and Convex) by Roberto Carlos, "Sabor A Nada??" (Flavor to Nothing) by Palito Ortega, "Sombras Nada Más" (Nothing More that Shadows) by Javier Solis, "Mañana Me Iré" (Tomorrow I'll Go Myself) by Los Angeles Negros, "Tú Sabes" (You Know) of Estelita del Llano between others.

Exceptional object

In three dimensions there are four Kepler–Poinsot polyhedra, and in four dimensions ten Schläfli–Hess polychora; in higher dimensions there are no non-convex regular figures.

Force-directed graph drawing

Because of this work, embeddings of planar graphs with convex faces are sometimes called Tutte embeddings.

Hong San See

The main hall has six solid timber columns that are convex in mid-shaft.

Kirkpatrick–Seidel algorithm

The basic idea of the algorithm is a kind of reversal of the divide-and-conquer algorithm for convex hulls of Preparata and Hong, dubbed as "marriage-before-conquest" by the authors.

Lateral process of the zygomatic bone

The lateral process of the zygomatic bone (or malar) is convex and perforated near its center by a small aperture, the zygomaticofacial foramen, for the passage of the zygomaticofacial nerve and vessels; below this foramen is a slight elevation, which gives origin to the Zygomaticus.

Lensmeter

In 1876, Hermann Snellen introduced a phakometer which was a similar set up to an optical bench which could measure the power and find the optical centre of a convex lens.

Pavise

A pavise (or pavis, pabys, or pavesen, all of them words stemming from the name of the city of Pavia, in Italy) is a large convex shield of European origin used to protect the entire body.

Photographic lens design

This problem is resolved by constructing the lens as an inverted telephoto, or retrofocus with the front element having a very short focal length, often with a highly exaggerated convex front surface and behind it a strongly negative lens grouping that extends the cone of focused rays so that they can be brought to focus at a reasonable distance.

Pre-Columbian period in Venezuela

Archeologists have discovered evidence of the earliest known inhabitants of the Venezuelan area in the form of leaf-shaped flake tools, together with chopping and planoconvex scraping implements exposed on the high riverine terraces of the Pedregal River in western Venezuela.

Quedius fuliginosus

It is similar in appearance to Quedius curtipennis, which is a more common species, however, the eyes of fuliginosus are more convex and the basal antennal segments darker.

Separation theorem

Hyperplane separation theorem (geometry) is either of two theorems about disjoint convex sets in n-dimensional Euclidean space.

Simplex

Stephen Boyd and Lieven Vandenberghe, Convex Optimization, (2004) Cambridge University Press, New York, NY, USA.

Temnora probata

It is very similar to Temnora burdoni, but the forewing apex and tornus and hindwing tornus are more pronounced and the middle of the forewing outer margin is very convex.

Uniform tessellation

George Olshevsky, Uniform Panoploid Tetracombs, Manuscript (2006) (Complete list of 11 convex uniform tilings, 28 convex uniform honeycombs, and 143 convex uniform tetracombs)

Wehrmacht mountain troops badge

Pre-war versions often had a slightly convex shape while the late-war M43 field cap variant is more flat.

Winnipegoceras

Winnipegoceras, named by Foerste (1922) for fossils found near Winnipeg in Manitoba, Canada, is known by it large, slender, compressed, strongly curved exogastric shells; long slender body chamber and siphuncle that is slightly removed from the venter which is the outer, longitudinally convex margin.

Zygomatic bone

The malar surface is convex and perforated near its center by a small aperture, the zygomaticofacial foramen, for the passage of the zygomaticofacial nerve and vessels; below this foramen is a slight elevation, which gives origin to the Zygomaticus.

Zygomaticofacial foramen

The malar surface of the zygomatic bone is convex and perforated near its center by a small aperture, the zygomaticofacial foramen, for the passage of the zygomaticofacial nerve and vessels; below this foramen is a slight elevation, which gives origin to the Zygomaticus.


see also