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Compression body information


In the theory of 3-manifolds, a compression body is a kind of generalized handlebody.

A compression body is either a handlebody or the result of the following construction:

Let be a compact, closed surface (not necessarily connected). Attach 1-handles to along .

Let be a compression body. The negative boundary of C, denoted , is . (If is a handlebody then .) The positive boundary of C, denoted , is minus the negative boundary.

There is a dual construction of compression bodies starting with a surface and attaching 2-handles to . In this case is , and is minus the positive boundary.

Compression bodies often arise when manipulating Heegaard splittings.

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Compression body

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In the theory of 3-manifolds, a compression body is a kind of generalized handlebody. A compression body is either a handlebody or the result of the following...

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Murder of Annie Le

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found that Le's death was a result of "traumatic asphyxia due to neck compression". On September 17 police arrested Raymond Clark, a 24-year-old laboratory...

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Asphyxia

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Examples of chest compression include the knee-on-stomach position; or techniques such as leg scissors (also referred to as body scissors and in budō...

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Death of Paulette Gebara Farah

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asphyxia, “by obstruction of the nasal cavities and thorax-abdominal compression". She was buried at the Panteón Francés de San Joaquín (French Saint...

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Compression release engine brake

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A compression release engine brake, compression brake, or decompression brake is an engine braking mechanism installed on some diesel engines. When activated...

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Compression garment

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Compression garments are pieces of clothing that fit tightly around the skin. In medical contexts, compression garments provide support for people who...

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Compression stockings

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Compression stockings (Flight Socks, Support Bandage) are a specialized hosiery designed to help prevent the occurrence of, and guard against further...

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Gzip

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gzip is a file format and a software application used for file compression and decompression. The program was created by Jean-loup Gailly and Mark Adler...

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Compression fitting

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A compression fitting is a fitting used in plumbing and electrical conduit systems to join two tubes or thin-walled pipes together. In instances where...

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Spaghettification

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referred to as the noodle effect) is the vertical stretching and horizontal compression of objects into long thin shapes (rather like spaghetti) in a very strong...

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Ischemic compression

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Ischemic compression is a therapy technique used in manual therapy, where blockage of blood in an area of the body is deliberately made, so that a resurgence...

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Bandage

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better fit areas of the body that bend. The bandages have been produced with 3D-printed molds. Bandage scissors Tulle gras Compression stockings Field dressing...

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Compression seal fitting

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A compression seal fitting, unlike an epoxy seal or gasket, uses mechanical components and an axial force to compress a soft sealant inside a body which...

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Compression belt

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A compression belt is a type of spinal brace worn around the waist and lower back that compresses the abdomen. It centers the body's mass, and effectively...

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Heegaard splitting

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replacing handlebodies with compression bodies. The gluing map is between the positive boundaries of the compression bodies. A closed curve is called essential...

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Nerve compression syndrome

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Nerve compression syndrome, or compression neuropathy, or nerve entrapment syndrome, is a medical condition caused by chronic, direct pressure on a peripheral...

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Vertebral compression fracture

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A compression fracture is a collapse of a vertebra. It may be due to trauma or due to a weakening of the vertebra (compare with burst fracture). This...

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Tensegrity

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both nature as well as human-made objects: in the human body, the bones are held in compression while the connective tissues are held in tension, and the...

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Compressor

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compression Ideal Brayton Cycle 1->2 Isentropic compression in a compressor Ideal Vapor-compression refrigeration Cycle 1->2 Isentropic compression in...

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BREACH

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Exfiltration via Adaptive Compression of Hypertext) is a security vulnerability against HTTPS when using HTTP compression. BREACH is built based on the...

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Dementia with Lewy bodies

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Dementia with Lewy bodies (DLB) is a type of dementia characterized by changes in sleep, behavior, cognition, movement, and regulation of automatic bodily...

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Spondylosis

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(removal of vertebral body) and fusion, and cervical arthroplasty (joint surgery) can be used to relieve the spinal cord from compression. The anterior approach...

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Diesel engine

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of the air in the cylinder due to mechanical compression; thus, the diesel engine is called a compression-ignition engine (CI engine). This contrasts with...

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Cold compression therapy

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Cold compression therapy, also known as hilotherapy, combines two of the principles of rest, ice, compression, elevation to reduce pain and swelling from...

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Strangling

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Look up strangling in Wiktionary, the free dictionary. Strangling is compression of the neck that may lead to unconsciousness or death by causing an increasingly...

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JPEG

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method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted...

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Computational topology

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implemented algorithmically in computer software. Neither has the compression-body decomposition. There are some very popular and successful heuristics...

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Honda D engine

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1237 cc (75.5 cu in) Bore and Stroke: 72 mm x 76 mm (2.83 in x 2.99 in) Compression: 9.5:1 Power: 76 PS (56 kW; 75 hp) at 6,500 rpm Torque: 10.0 kg⋅m (98 N⋅m;...

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