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A **domain wall** is a type of topological soliton that occurs whenever a discrete symmetry is spontaneously broken. Domain walls also sometimes called **kinks** in analogy with closely related kink solution of the sine-Gordon model. Unstable domain walls can also appear if spontaneously broken discrete symmetry is approximate and there is the metastable vacuum.

A domain (hyper volume) is extended in three spatial dimensions and one time dimension. A domain wall is the boundary between two neighboring domains. Thus a domain wall is extended in two spatial dimensions and one time dimension.

Important examples are:

Besides these important cases similar solitons appear in wide spectrum of the models. Here are other examples:

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https://wn.com/Domain_wall

**Domain** is a German power metal band.

Domain first impressed fans of melodic metal back in the 1980s with their first works, "Lost In The City" (still under the old band name *Kingdom*), "Before The Storm" and "Crack in The Wall", as well as with their hit songs such as 'Lost In The City' and ‚ 'I Don’t Wanna Die'. Single "Heart Of Stone was a title song of german mini-serial "Bastard".

But it was their next albums, "One Million Lightyears From Home" (2001), "The Artefact" (2002) and "The Sixth Dimension" (2003) as well as a successful tour with the rock legends, Glenn Hughes and Joe Lynn Turner (HTP) that secured the quintet a place in the European Melodic Metal scene. With a harder edged sound, Domain still had a good following. And that was when the career of the guitarist Axel "Ironfinger" Ritt (Grave Digger), ex-vocalist Carsten Lizard Schulz (Evidence One et al.), and the long-term band mates keyboarder Erdmann Lange, ex-bass player Jochen Mayer (Boysvoice, Demon Drive, Casanova) and the ex-drummer Stefan Köllner really began…

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https://wn.com/Domain_(band)

In mathematics, and more specifically in naive set theory, the **domain of definition** (or simply the **domain**) of a function is the set of "input" or argument values for which the function is defined. That is, the function provides an "output" or value for each member of the domain. Conversely, the set of values the function takes on as output is termed the image of the function, which is sometimes also referred to as the range of the function.

For instance, the domain of cosine is the set of all real numbers, while the domain of the square root consists only of numbers greater than or equal to 0 (ignoring complex numbers in both cases). When the domain of a function is a subset of the real numbers, and the function is represented in an *xy* Cartesian coordinate system, the domain is represented on the *x*-axis.

Given a function *f*:*X*→*Y*, the set *X* is the **domain** of *f*; the set *Y* is the codomain of *f*. In the expression *f*(*x*), *x* is the **argument** and *f*(*x*) is the **value**. One can think of an argument as an input to the function, and the value as the output.

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Coordinates: 43°N 12°E / 43°N 12°E / 43; 12

**Italy** (^{i}/ˈɪtəli/; Italian: *Italia* [iˈtaːlja]), officially the **Italian Republic** (Italian: *Repubblica Italiana*), is a unitary parliamentary republic in Europe. Italy covers an area of 301,338 km^{2} (116,347 sq mi) and has a largely Mediterranean and temperate climate; due to its shape, it is often referred to in Italy as *lo Stivale* (the Boot). With 61 million inhabitants, it is the 4th most populous EU member state. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino and Vatican City.

Since ancient times, Greeks, Etruscans and Celts have inhabited the south, centre and north of the Italian Peninsula respectively. Rome ultimately emerged as the dominant power, conquering much of the ancient world and becoming the leading cultural, political, and religious centre of Western civilisation. The legacy of the Roman Empire is widespread and can be observed in the global distribution of civilian law, Republican governments, Christianity and the latin script.

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https://wn.com/Italy

**Roman Italy** was created officially by the Roman Emperor Augustus with the Latin name * Italia*. It was the first time in history that the Italian peninsula (from the Alps to the Ionian Sea) was united under the same name. In the year 292, the three islands of Corsica, Sardinia and Sicily were added to Roman Italy by Emperor Diocletianus.

*Italy* (*Italia* in Latin and Italian) was the name of the administrative division of the Italian peninsula during the Roman era. It was not a province, but became the territory of the city of Rome, thus having a special status. Following the end of the Social War (91–88 BC), Rome had allowed its Italian allies (*socii*) full rights in Roman society and granted the Roman citizenship to all the Italic peoples.

After having been for centuries the heart of the Empire, from the 3rd century the government and the cultural center began to move eastward: first the Edict of Caracalla in 212 AD extended Roman citizenship to all free men within the imperial boundaries, then during Constantine's reign (306–337) the seat of the Empire was moved to Constantinople in 330 AD.

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* Italia* is a 12-metre class yacht that competed in the 1987 Louis Vuitton Cup.

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https://wn.com/Italia_(yacht)

A **domain wall** is a type of topological soliton that occurs whenever a discrete symmetry is spontaneously broken. Domain walls also sometimes called **kinks** in analogy with closely related kink solution of the sine-Gordon model. Unstable domain walls can also appear if spontaneously broken discrete symmetry is approximate and there is the metastable vacuum.

A domain (hyper volume) is extended in three spatial dimensions and one time dimension. A domain wall is the boundary between two neighboring domains. Thus a domain wall is extended in two spatial dimensions and one time dimension.

Important examples are:

Besides these important cases similar solitons appear in wide spectrum of the models. Here are other examples:

This page contains text from Wikipedia, the Free Encyclopedia -
https://wn.com/Domain_wall

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WorldNews.com | 22 Feb 2019

WorldNews.com | 22 Feb 2019

WorldNews.com | 22 Feb 2019

WorldNews.com | 22 Feb 2019

WorldNews.com | 22 Feb 2019

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