Injective hulls are maximal essential extensions, and turn out to be minimal injective extensions.

Injective modules were introduced in and are discussed in some detail in the textbook.

Injective metric spaces were introduced and studied first by, prior to the study of Met as a category ; they may also be defined intrinsically in terms of a Helly property of their metric balls, and because of this alternative definition Aronszajn and Panitchpakdi named these spaces hyperconvex spaces.

Injective modules have been heavily studied, and a variety of additional notions are defined in terms of them: Injective cogenerators are injective modules that faithfully represent the entire category of modules.

Injective modules include divisible groups and are generalized by the notion of injective objects in category theory.

Injective resolutions measure how far from injective a module is in terms of the injective dimension and represent modules in the derived category.

* A. Connes, Classification of Injective Factors The Annals of Mathematics 2nd Ser., Vol.

Other than Culloden, the only British ships seriously damaged in their hulls were Bellerophon, Majestic and Vanguard, while Bellerophon and Majestic were the only ships to lose masts: Majestic the main and mizzen and Bellerophon all three.

Thirteen years after being raised, the ships were burned during an attack in the Second World War, and almost nothing remains of the hulls, though many archeological treasures remain intact in the museum at Lake Nemi and in the Museo Nazionale Romano ( Palazzo Massimo ) at Rome.

Although details of their physiology were not mentioned on screen, the space slug, ( a giant worm-like creature that lived on asteroids in the vacuum of space ), and the Mynock, ( pesky bat-like vermin that would attach to spaceship hulls and chew through power conduits to feed off the raw energy ), are said to be silicon-based organisms in Star Wars Expanded Universe sources.

Often hulls were built of steel only 1 / 8in thick.

Like the larger 74 which was developed at the same time, the new frigates sailed very well and were good fighting vessels due to a combination of long hulls and low upperworks compared to vessels of comparable size and firepower.

The list of ' modern ' world champions extended into the 1980s, when the sport entered the catamaran, and then the ' superboat ' era-the 1000 cubic inch total engine displacement restrictions were lifted for boats over in length, and soon three-and four-engine boats sporting F16 fighter canopies replaced the venerable vee hulls that had been the sport's top category for twenty years.

Various proposals for disposal of those hulls were considered, including sinking them at sea, but none were economically practical.

In the 1860s, however, the major build-up of naval and military infrastructure brought vital money into Bermuda at a time when its traditional maritime industries were giving way under the assault of steel hulls and steam propulsion.

The original pre – World War I torpedo boats were designed with " displacement " hulls.

A somewhat odd footnote is that even though only half as many Higgins boats were produced, far more survive ( seven hulls, 3 of which have been restored to their World War II configuration ), than of the more numerous Elco boats, thus seemingly demonstrating the superior construction of the Higgins boat.

In the 1860s, however, the major build-up of naval and military infrastructure brought vital money into Bermuda at a time when its traditional ( cedar-and sail cloth-based ) maritime industries were giving way under the assault of steel hulls and steam propulsion.

The hulls of these ships were painted a stark white, giving the armada the nickname " Great White Fleet ".

The hulls were painted white, the Navy's peacetime color scheme, decorated with gilded scrollwork with a red, white, and blue banner on their bows.

The Allied navies at this time were still deploying essentially the same technology as during the Napoleonic Wars: sailing ships, unarmoured wooden hulls and muzzle-loading smoothbore cannon.

The navies, especially the British one, had ignored the new technologies that were to transform them by the 1850s: steam propulsion, ironclad hulls, rifled guns and explosive shells.

Boat hulls were built at his boatyard ( owned in partnership with a man named Morgan Gaskill ), located on 3rd street in the 1830s and 1840s.

Initially the hulls were constructed of wood, with lines like those of any other small merchant ship.

Called BACAT, for Barges Aboard Catamaran, the system consisted of trains of barges, which were pushed by a tug, and which would be loaded between the twin hulls of a custom-built delivery ship.

VW Schwimmwagens were both produced by the Volkswagen factory at Fallersleben / Wolfsburg, as well as by Porsche's facilities in Stuttgart ; with the bodies ( or rather hulls ) produced by Ambi Budd in Berlin.

The cannons of 18th century men of war were accurate only at short range, and their penetrating power mediocre, entailing that thick hulls of wooden ships could only be pierced at short ranges.

Following the submarines ' large trail of debris led Ballard and his team directly to both of them and made it significantly easier for them to locate the submarines than if they were to search for the hulls directly.

Historically most brigs were made of wood, although some latter brigs were built with hulls and masts of steel or iron ( such as the brig Bob Allen ).

In 1824 to reduce the impact of this destructive electrolytic action on ships hulls, their fastenings and underwater equipment, the Victorian scientist-engineer Sir Humphry Davy, developed the first and still most widely used marine electrolysis protection system.

The traditional bottom is made from planks laid fore and aft and not transverse, although some hulls have a second set of planks laid over the first in a pattern that is crosswise to the main hull for additional wear and strength.

They include Minnesota v. Barber, 136 U. S. 313, ( 1890 ) ( striking down a Minnesota statute that required any meat sold within the State, whether originating within or without the State, to be examined by an inspector within the State ); Foster-Fountain Packing Co. v. Haydel, 278 U. S. 1 ( 1928 ) ( striking down a Louisiana statute that forbade shrimp to be exported unless the heads and hulls had first been removed within the State ); Johnson v. Haydel, 278 U. S. 16 ( 1928 ) ( striking down analogous Louisiana statute for oysters ); Toomer v. Witsell, 334 U. S. 385 ( 1948 ) ( striking down South Carolina statute that required shrimp fishermen to unload, pack, and stamp their catch before shipping it to another State ); Pike v. Bruce Church, Inc., supra ( striking down Arizona statute that required all Arizona-grown cantaloupes to be packaged within the State prior to export ); South-Central Timber Development, Inc. v. Wunnicke, 467 U. S. 82 ( 1984 ) ( striking down an Alaska regulation that required all Alaska timber to be processed within the State prior to export ).

When the script was first drafted in May 1959, with the storyline of an aeroplane of celebrities in the Atlantic, it included elements from Fleming's friend Ernie Cuneo, who included ships with underwater trapdoor in their hulls and an underwater battle scene.

His first attempts to fly attracted large crowds, though the aircraft failed to take off and required a re-design of the floats incorporating features of Borwick ’ s successful speed-boat hulls.

This was the first commercial ship model testing tank built in the world and it retains many original features today: a water tank as long as a football pitch, clay moulding beds for casting wax model ship hulls and the original Victorian machinery used for shaping models.

1862 also saw the construction of major ship building facilities, including those of Chantier Scott, which launched of the first French constructed ships with metal hulls ( the company went bankrupt in 1866 ).

The principle itself was well known of old and had been in use on warships ( one of the earliest recorded uses of sloped armour was on early Confederate ironclads, such as the CSS Virginia ) and partially implemented on the first French tank, the Schneider CA1 in the First World War, but the first tanks to be completely fitted with sloped armour were the French SOMUA S35 and other contemporary French tanks like the Renault R35, which had fully cast hulls and turrets.

The Society printed the first Register of Ships in 1764 in order to give both underwriters and merchants an idea of the condition of the vessels they insured and chartered: ship hulls were graded by a lettered scale ( A being the best ), and ship's fittings ( masts, rigging, and other equipment ) was graded by number ( 1 being the best ).

The same shipyard built the steam gunboats: Initiator, Carioca, Camocim, and Cabedelo Marajo beyond patach Apprentice, all iron and steel hulls, marking the first of that kind built in Brazil.

Due to their ' V '- shaped hulls, dories, especially those that are more slab-sided than rounded, have a tendency to heel sharply at first.

Although the vehicle entered service in 1955 and in the same year the No. 174 Works located in Omsk began producing the hulls and turrets, the first vehicles were completed in 1957 after the first 249 57 mm twin S-68 guns were produced by the Artillery Works No. 946 located in Krasnoyarsk.

He designed and built a number of boats including the Bandholm 26, the Bianca 27 and the Great Dane 28, which were the first Danish boats to be built using fibreglass hulls, the Bandholm 20, Bandholm 30, the Mariboat and the Bandholm 24.

The advent of proper missile and electronic counter measure technologies gave birth to the idea that, because a missile is far more accurate than a shell and can penetrate even the most heavily armored ship hulls, warships should now be designed to outmaneuver their enemies and get to a better position first.

The Skuzzy was the first sternwheeler to make it through the rapids, which was built with multiple-compartment hulls to preserve it from sinking from rock damage.

The first application this steel was used for was the hulls of container ships.

The first Hobie Cat is credited with being first built in 1965 and featured a structure similar to the AQUA CAT, but slightly heavier with rockered hulls that did not rely on dagger boards.

There were also so many delays in the production of the turrets that after the first 380 hulls had been produced in 1936 and only 37 could be fitted with a turret, production was slowed down to 200 annually.

Boat manufacture is well known to be of a very high quality and durability, thus hulls from the very first molds are still competing effectively.