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The problem of determining if a given set of Wang tiles can tile the plane. The problem of determining the Kolmogorov complexity of a string. Hilbert's tenth problem: the problem of deciding whether a Diophantine equation (multivariable polynomial equation) has a solution in integers.
Barring unforeseen operational commitments and engagements, military divers hoped to use this project as a training platform for several years and "recover the maximum number of tires possible from day one." [10] Summer 2007 saw US Navy, Army, and Coast Guard divers based out of a Coast Guard base in Dania Beach, Florida working to clean the reef.
An erosion gully in Australia caused by rabbits, an unintended consequence of their introduction as game animals. In the social sciences, unintended consequences (sometimes unanticipated consequences or unforeseen consequences, more colloquially called knock-on effects) are outcomes of a purposeful action that are not intended or foreseen.
This is a list of some of the more commonly known problems that are NP-complete when expressed as decision problems. As there are thousands of such problems known, this list is in no way comprehensive. Many problems of this type can be found in Garey & Johnson (1979).
Smale's problems is a list of eighteen unsolved problems in mathematics proposed by Steve Smale in 1998 [1] and republished in 1999. [2] Smale composed this list in reply to a request from Vladimir Arnold, then vice-president of the International Mathematical Union, who asked several mathematicians to propose a list of problems for the 21st century.
The former is an example of simple problem solving (SPS) addressing one issue, whereas the latter is complex problem solving (CPS) with multiple interrelated obstacles. [1] Another classification of problem-solving tasks is into well-defined problems with specific obstacles and goals, and ill-defined problems in which the current situation is ...
Northern Viking. Annual exercise held in Iceland, every two years until 2006 when the frequency was increased. Tests capability and inter-operability of forces. Includes naval vessels, fighter planes and helicopters from multiple countries. Size example: involved transfer of 400 foreign troops to iceland in 2008. Joint Warrior. Ongoing since ...
Logical analyses focus on "truth values", for example by identifying it as paradox of self-reference. Epistemological studies of the paradox instead focus on issues relating to knowledge; [2] for example, one interpretation reduces it to Moore's paradox. [3] Some regard it as a "significant problem" for philosophy. [4]