Elementary number

An elementary number is one formalization of the concept of a closed-form number. The elementary numbers form an algebraically closed field containing the roots of arbitrary equations using field operations, exponentiation, and logarithms.

References

Richardson, Daniel (1997). "How to recognize zero". Journal of Symbolic Computation 24 (6): pp. 627–645. doi:10.1006/jsco.1997.0157. .

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