Lana Del Rey – Lust For Life (Limited Edition)

Del, or nabla, is an operator used in mathematics (particularly in vector calculus) as a vector differential operator, usually represented by the nabla symbol ∇. When applied to a function defined on a one-dimensional domain, it denotes the standard derivative of the function as defined in calculus. When applied to a field (a function defined on a multi-dimensional domain), it may denote any one of three operations depending on the way it is applied: the gradient or (locally) steepest slope of a scalar field (or sometimes of a vector field, as in the Navier–Stokes equations); the divergence of a vector field; or the curl (rotation) of a vector field.

Del is a very convenient mathematical notation for those three operations (gradient, divergence, and curl) that makes many equations easier to write and remember. The del symbol (or nabla) can be formally defined as a vector operator whose components are the corresponding partial derivative operators. As a vector operator, it can act on scalar and vector fields in three different ways, giving rise to three different differential operations: first, it can act on scalar fields by a formal scalar multiplication—to give a vector field called the gradient; second, it can act on vector fields by a formal dot product—to give a scalar field called the divergence; and lastly, it can act on vector fields by a formal cross product—to give a vector field called the curl. These formal products do not necessarily commute with other operators or products. These three uses, detailed below, are summarized as:

• Gradient: ${\displaystyle \operatorname {grad} f=\nabla f}$
• Divergence: ${\displaystyle \operatorname {div} \mathbf {v} =\nabla \cdot \mathbf {v} }$
• Curl: ${\displaystyle \operatorname {curl} \mathbf {v} =\nabla \times \mathbf {v} }$

Edition may refer to:

• Edition (book), a bibliographical term for a substantially similar set of copies
• Edition (printmaking), a publishing term for a set print run
• Edition (textual criticism), a particular version of a text
• Edition Records, a British independent record label
• "Edition", a song by Rex Orange County

Lana may refer to:

• Lana (given name)
• Francesco Lana de Terzi (1631–1687), Italian Jesuit priest and scientist
• Lana Del Rey, American singer-songwriter
• Lana Turner, American actress
• Lana Rhoades, American former adult film actress
• CJ Perry, professional wrestler and pro wrestling manager, who formerly competed under the ring-name 'Lana'
• Wild Energy. Lana, a 2006 Ukrainian fantasy novel

Life is a quality that distinguishes matter that has biological processes, such as signaling and self-sustaining processes, from matter that does not. It is defined descriptively by the capacity for homeostasis, organisation, metabolism, growth, adaptation, response to stimuli, and reproduction. All life over time eventually reaches a state of death, and none is immortal. Many philosophical definitions of living systems have been proposed, such as self-organizing systems. Viruses in particular make definition difficult as they replicate only in host cells. Life exists all over the Earth in air, water, and soil, with many ecosystems forming the biosphere. Some of these are harsh environments occupied only by extremophiles.

Life has been studied since ancient times, with theories such as Empedocles's materialism asserting that it was composed of four eternal elements, and Aristotle's hylomorphism asserting that living things have souls and embody both form and matter. Life originated at least 3.5 billion years ago, resulting in a universal common ancestor. This evolved into all the species that exist now, by way of many extinct species, some of which have left traces as fossils. Attempts to classify living things, too, began with Aristotle. Modern classification began with Carl Linnaeus's system of binomial nomenclature in the 1740s.

Living things are composed of biochemical molecules, formed mainly from a few core chemical elements. All living things contain two types of large molecule, proteins and nucleic acids, the latter usually both DNA and RNA: these carry the information needed by each species, including the instructions to make each type of protein. The proteins, in turn, serve as the machinery which carries out the many chemical processes of life. The cell is the structural and functional unit of life. Smaller organisms, including prokaryotes (bacteria and archaea), consist of small single cells. Larger organisms, mainly eukaryotes, can consist of single cells or may be multicellular with more complex structure. Life is only known to exist on Earth but extraterrestrial life is thought probable. Artificial life is being simulated and explored by scientists and engineers.

Lust is an intense desire for something. Lust can take any form such as the lust for sexuality (see libido), money, or power. It can take such mundane forms as the lust for food (see gluttony) as distinct from the need for food or lust for redolence, when one is lusting for a particular smell that brings back memories. It is similar to but distinguished from passion, in that passion propels individuals to achieve benevolent goals whilst lust does not.

Rey or REY may refer to:

• Rey (given name), a given name
• Rey (surname), a surname
• Rey Skywalker, a character in the Star Wars films
• Rey, Iran, a city in Iran
• Ray County, in Tehran Province of Iran
• Rey (film), a 2015 Indian film
• The Rey Commission of the European Union
• Rey (band), a Japanese band who perform theme songs
• Corey Lewis, a comic book creator also known as "Rey"