Hypertranscendental function

Mathematics analytic function From Wikipedia, the free encyclopedia

A hypertranscendental function or transcendentally transcendental function is a transcendental analytic function which is not the solution of an algebraic differential equation with coefficients in (the integers) and with algebraic initial conditions.

History

The term 'transcendentally transcendental' was introduced by E. H. Moore in 1896; the term 'hypertranscendental' was introduced by D. D. Morduhai-Boltovskoi in 1914.[1][2]

Definition

One standard definition (there are slight variants) defines solutions of differential equations of the form

,

where is a polynomial with constant coefficients, as algebraically transcendental or differentially algebraic. Transcendental functions which are not algebraically transcendental are transcendentally transcendental. Hölder's theorem shows that the gamma function is in this category.[3][4][5]

Hypertranscendental functions usually arise as the solutions to functional equations, for example the gamma function.

Examples

Hypertranscendental functions

Transcendental but not hypertranscendental functions

Non-transcendental (algebraic) functions

See also

Notes

References

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