(mathematics) | computability theory - The area of theoretical computer science
concerning what problems can be solved by any computer.A function is computable if an algorithm can be implemented which will give the correct output for any valid input. Since computer programs are countable but real numbers are not, it follows that there must exist real numbers that cannot be calculated by any program. Unfortunately, by definition, there isn't an easy way of describing any of them! In fact, there are many tasks (not just calculating real numbers) that computers cannot perform. The most well-known is the halting problem, the busy beaver problem is less famous but just as fascinating. ["Computability", N.J. Cutland. (A well written undergraduate-level introduction to the subject)]. ["The Turing Omnibus", A.K. Dewdeney]. |

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**-- computability theory --**

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computational complexity

computational geometry

computational learning

computational linguist

computational linguistics

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compute server

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Compulsorily

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CompuServe Corporation

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Computable

Computation

Computation counting

computational

Computational Adequacy Theorem

computational complexity

computational geometry

computational learning

computational linguist

computational linguistics

computationally

Compute

COMpute ParallEL

compute server

computed axial tomography

computed tomography