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Prizes are often awarded for the solution to a long-standing problem, and some lists of unsolved problems, such as the Millennium Prize Problems, receive considerable attention. This list is a composite of notable unsolved problems mentioned in previously published lists, including but not limited to lists considered authoritative.
The three-body problem is a special case of the n-body problem, which describes how n objects move under one of the physical forces, such as gravity. These problems have a global analytical solution in the form of a convergent power series, as was proven by Karl F. Sundman for n = 3 and by Qiudong Wang for n > 3 (see n-body problem for details
Social communication disorder. Pervasive developmental disorder. Auditory processing disorder. Communication disorder. Autism spectrum disorder (formally a category that included Asperger syndrome, Classic autism and Rett syndrome) Attention deficit hyperactivity disorder (ADHD) Developmental coordination disorder.
A list of 72 angels of the 9 choir orders, with esoteric meaning related to the names of God Selaphiel: Sealtiel, Selatiel Christianity Archangel Patron saint of prayer and worship Seraph (type) [note 1] Seraphim (plural) Christianity, Islam, Judaism (type) Seraphiel [19] Christianity, Judaism Seraph Protector of Metatron, chief of seraphim ...
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...
incorporating open-ended problems in the mathematics classroom. Open-ended problems, compared to closed problems, present students with varied approaches or multiple solutions to a problem. Research suggests that using open-ended problems in the classroom is an effective teaching strategy for establishing, consolidating, extending, reinforcing and
This is a list of demons that appear in religion, theology, demonology, mythology, and folklore. It is not a list of names of demons, although some are listed by more than one name. The list of demons in fiction includes those from literary fiction with theological aspirations, such as Dante's Inferno.
Under former Sheriff Alex Villanueva, detectives secretly investigated and urged the state attorney general to prosecute a Los Angeles Times reporter who wrote on a leaked list of problem deputies.