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Natural sciences, engineering and medicine. Unsolved problems in astronomy. Unsolved problems in biology. Unsolved problems in chemistry. Unsolved problems in geoscience. Unsolved problems in medicine. Unsolved problems in neuroscience. Unsolved problems in physics.
The RTA list of open problems – open problems in rewriting. The TLCA List of Open Problems – open problems in area typed lambda calculus. Categories: Conjectures. Lists of unsolved problems. Unsolved problems in computer science.
The problem for graphs is NP-complete if the edge lengths are assumed integers. The problem for points on the plane is NP-complete with the discretized Euclidean metric and rectilinear metric. The problem is known to be NP-hard with the (non-discretized) Euclidean metric. [ 3]: ND22, ND23. Vehicle routing problem.
Outer Wilds is a 2019 action-adventure video game developed by Mobius Digital and published by Annapurna Interactive. The game follows the player character as they explore a planetary system stuck in a 22-minute time loop that resets after the sun goes supernova and destroys the system. Through repeated attempts they investigate alien ruins to ...
v. t. e. A research question is "a question that a research project sets out to answer". [ 1] Choosing a research question is an essential element of both quantitative and qualitative research. Investigation will require data collection and analysis, and the methodology for this will vary widely. Good research questions seek to improve ...
Operations research ( British English: operational research) (U.S. Air Force Specialty Code: Operations Analysis), often shortened to the initialism OR, is a discipline that deals with the development and application of analytical methods to improve decision-making. [ 1] The term management science is occasionally used as a synonym.
Mathematical optimization (alternatively spelled optimisation) or mathematical programming is the selection of a best element, with regard to some criteria, from some set of available alternatives. [ 1][ 2] It is generally divided into two subfields: discrete optimization and continuous optimization.
This list of global issues presents problems or phenomena affecting people around the world, including but not limited to widespread social issues, economic issues, and environmental issues. Organizations that maintain or have published an official list of global issues include the United Nations, and the World Economic Forum.