Black hole - Wikipedia
Web23 timer siden · For example, in the fuzzball model based on string theory, the individual states of a black hole solution do not generally have an event horizon or singularity, but for a classical/semiclassical observer the statistical average of such states appears just as an ordinary black hole as deduced from general relativity.
Carl Friedrich Gauss - Wikipedia
Web23 timer siden · Johann Carl Friedrich Gauss (German: Gauß [kaʁl ˈfʁiːdʁɪç ˈɡaʊs] ⓘ; Latin: Carolus Fridericus Gauss; 30 April 1777 – 23 February 1855) was a German mathematician, astronomer, geodesist, and physicist who contributed to many fields in mathematics and science. He ranks among history's most influential mathematicians and …
Bernt Øksendal: Optimal control of SPDEs driven by time-space
Webden 3. jun. 2024 · In this talk we study the optimal control of systems where the state dynamics satisfy a stochastic partial differential equation (SPDE) driven by a two-parameter (time-space) Brownian motion (also called Brownian sheet). Such equations can for example model the growth of an ecosystem under uncertainty in time and space.
Model theory - Wikipedia
Web23 timer siden · In mathematical logic, model theory is the study of the relationship between formal theories (a collection of sentences in a formal language expressing statements about a mathematical structure), and their models (those structures in which the statements of the theory hold). The aspects investigated include the number and size of models of a …
Index of language articles - Wikipedia
Web23 timer siden · This is a partial index of Wikipedia articles treating natural languages, arranged alphabetically and with (sub-) families mentioned.The list also includes extinct languages. For a published list of languages, see ISO 639-1 (list of ISO 639 language codes for 136 major languages), or for a more inclusive list, see ISO 639-3 (list of ISO 639-3 …
Group (mathematics) - Wikipedia
Web23 timer siden · The manipulations of the Rubik's Cube form the Rubik's Cube group.. In mathematics, a group is a set with an operation that satisfies the following constraints: the operation is associative and has an identity element, and every element of the set has an inverse element.. Many mathematical structures are groups endowed with other …
Hassium - Wikipedia
Web23 timer siden · Hassium is a synthetic chemical element; it has symbol Hs and atomic number 108. Hassium is highly radioactive: its most stable known isotopes have half-lives of approximately ten seconds. One of its isotopes, 270 Hs, has magic numbers of protons and neutrons for deformed nuclei, giving it greater stability against spontaneous …
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