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A quincunx (/ ˈkwɪn.kʌŋks / KWIN-kunks) is a geometric pattern consisting of five points arranged in a cross, with four of them forming a square or rectangle and a fifth at its center. [1] The same pattern has other names, including "in saltire" or "in cross" in heraldry (depending on the orientation of the outer square), the five-point ...
To counter this, the visual system connects the image as a whole rather than a set of edges, allowing one to see an object rather than edges and non-edges. Although there is no complete image to be seen, the brain is able to accomplish this because of its understanding of the physical world and real incidents of ambiguous lighting. [6]
This square mandala has four similar protruding rectangular ‘gates’ in the cardinal directions guarded each by similar but smaller rectangular ‘gates’ on the left and right. Within the square there is an eight petalled flower or rayed-star, recently called as Maklang ‘Star fort’ by the locals, in the centre covering a total area of ...
Flecktarn (German pronunciation: [ˈflɛktaʁn]; "mottled camouflage"; also known as Flecktarnmuster or Fleckentarn) is a family of three-, four-, five- or six-color disruptive camouflage patterns, the most common being the five-color pattern, consisting of dark green, grey-green, red brown, and black over a light green or tan base depending on the manufacturer.
In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . Many writers begin the sequence with 0 and 1, although some authors start it from 1 and 1 [1][2] and some (as did Fibonacci) from 1 ...
Egyptian hieroglyph, Chinese counting rod. ||||. Maya numerals. ••••. Morse code. .... 4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5. It is a square number, the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures.
Example of an Egyptian design with wallpaper group p4m. A wallpaper group (or plane symmetry group or plane crystallographic group) is a mathematical classification of a two-dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns occur frequently in architecture and decorative art, especially in textiles, tiles ...
Diffraction spike. Diffraction spikes are lines radiating from bright light sources, causing what is known as the starburst effect[1] or sunstars[2] in photographs and in vision. They are artifacts caused by light diffracting around the support vanes of the secondary mirror in reflecting telescopes, or edges of non-circular camera apertures ...