List of unsolved problems may refer to several notable
conjectures
In mathematics, a conjecture is a conclusion or a proposition that is proffered on a tentative basis without proof. Some conjectures, such as the Riemann hypothesis (still a conjecture) or Fermat's Last Theorem (a conjecture until proven in 1 ...
or
open problem In science and mathematics, an open problem or an open question is a known problem which can be accurately stated, and which is assumed to have an objective and verifiable solution, but which has not yet been solved (i.e., no solution for it is know ...
s in various academic fields:
Natural sciences, engineering and medicine
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Unsolved problems in astronomy
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Unsolved problems in biology
This article lists notable unsolved problems in biology.
General biology
Evolution and origins of life
*Origin of life. Exactly how, where, and when did life on Earth originate? Which, if any, of the many hypotheses is correct? What were the ...
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Unsolved problems in chemistry
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Unsolved problems in engineering
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Unsolved problems in geoscience
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Unsolved problems in medicine
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Unsolved problems in neuroscience
There are yet unsolved problems in neuroscience, although some of these problems have evidence supporting a hypothesized solution, and the field is rapidly evolving. One major problem is even enumerating what would belong on a list such as this. ...
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Unsolved problems in physics
Mathematics, philosophy and information sciences
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Unsolved problems in mathematics
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Unsolved problems in statistics
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Unsolved problems in computer science
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Unsolved problems in philosophy
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Unsolved problems in information theory
Social sciences and languages
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Unsolved problems in economics
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Unsolved problems in fair division
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Unsolved problems in linguistics
See also
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Cold case
A cold case is a crime, or a suspected crime, that has not yet been fully resolved and is not the subject of a current criminal investigation, but for which new information could emerge from new witness testimony, re-examined archives, new or r ...
(unsolved crimes)
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List of ciphertexts
Some famous ciphertexts (or cryptogram
A cryptogram is a type of puzzle that consists of a short piece of encrypted text. Generally the cipher used to encrypt the text is simple enough that the cryptogram can be solved by hand. Substituti ...
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List of NP-complete problems
This is a list of some of the more commonly known problems that are NP-complete when expressed as decision problems. As there are hundreds of such problems known, this list is in no way comprehensive. Many problems of this type can be found in ...
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List of PSPACE-complete problems
Here are some of the more commonly known problems that are PSPACE-complete when expressed as decision problems. This list is in no way comprehensive.
Games and puzzles
Generalized versions of:
* Amazons
* Atomix
* Checkers
* Dyson Telesc ...
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List of paradoxes
This list includes well known paradoxes, grouped thematically. The grouping is approximate, as paradoxes may fit into more than one category. This list collects only scenarios that have been called a paradox by at least one source and have their ...
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List of undecidable problems
In computability theory, an undecidable problem is a type of computational problem that requires a yes/no answer, but where there cannot possibly be any computer program that always gives the correct answer; that is, any possible program would some ...
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List of unsolved deaths
This list of unsolved deaths includes well-known cases where:
* The cause of death could not be officially determined.
* The person's identity could not be established after they were found dead.
* The cause is known, but the manner of death (homi ...
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Lists of problems
The following articles contain lists of problems:
*List of undecidable problems
* Lists of unsolved problems
*List of NP-complete problems
This is a list of some of the more commonly known problems that are NP-complete when expressed as deci ...
{{DEFAULTSORT:Unsolved problems
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Science-related lists
Lists of problems
Engineering