In 2020 we are celebrating the **1/3 century anniversary** of our first publications on
Genetic Programming or GP for
programs of unlimited length (1987) [GP87] [META1] written in
a potentially universal programming language [GOD] [GOD34] [CHU] [TUR] [POS].
GP is about solving problems by applying the principles of
evolution to programs.

Our paper [GP87]
was based on GP for universal programming languages that I had implemented since 1985 on a Symbolics LISP Machine of SIEMENS AG.
We partially reimplemented this in the logic programming language PROLOG at my Alma Mater TU Munich.
Results were written up with
Dirk Dickmanns and Alexander Winklhofer,
my fellow students at TUM [GP87]
(authors in alphabetical order).

It should be mentioned that Nichael Cramer had an
earlier paper on "pure" GP (1985) [GP85].
And even earlier, Stephen F. Smith proposed a related approach as part
of a larger system [GP80].
To my knowledge, however, our papers [GP87] [META1]
introduced the first "modern" pure GP for
automatically evolving programs of unlimited size in a potentially "Turing-complete" coding language [GOD] [GOD34] [CHU] [TUR] [POS].

In the same year, Sec. 2 of my diploma thesis [META1]
applied such GP to itself, to recursively evolve
better GP methods. There was not only a meta-level but also a meta-meta-level and a meta-meta-meta-level etc.
I called this Meta-Evolution.
This was the first in a
long series of papers on metalearning
[META].

#

References

[GP87]
D. Dickmanns, J. Schmidhuber, A. Winklhofer (1987): Der genetische Algorithmus: Eine Implementierung in Prolog. Fortgeschrittenenpraktikum, Institut f. Informatik, Lehrstuhl Prof. Radig, Tech. Univ. Munich, 1987.
Searchable PDF scan (created by OCRmypdf which uses our
LSTM). Source code.
*[Probably the first work on Genetic Programming for evolving programs
of unlimited length written in a potentially universal programming language. Based on work I did since 1985 on a Symbolics Lisp Machine of SIEMENS AG. Authors in alphabetical order. More.]*

[GP85]
N. Cramer (1985).
A Representation for the Adaptive Generation of Simple Sequential Programs.
Proc. of an Intl. Conf. on Genetic Algorithms and their Applications,
Carnegie-Mellon University, July 24-26, 1985.

[GP80]
S. F. Smith (1980). A Learning System Based on Genetic
Adaptive Algorithms, PhD Thesis, Univ. Pittsburgh, 1980.

[META1]
J. Schmidhuber.
Evolutionary principles in self-referential learning, or on learning
how to learn: The meta-meta-... hook. Diploma thesis,
Institut für Informatik, Technische Universität München, 1987.
Searchable PDF scan (created by OCRmypdf which uses
LSTM).
HTML.
*[For example,
Genetic Programming
(GP) is applied to itself, to recursively evolve
better GP methods through Meta-Evolution.]*

[META]
J. Schmidhuber, 2020. Survey:
Metalearning Machines Learn to Learn (1987-)

[GOD]
K. Gödel. Über formal unentscheidbare Sätze der Principia Mathematica und verwandter Systeme I. Monatshefte für Mathematik und Physik, 38:173-198, 1931.
*[In the early 1930s, Gödel founded theoretical computer science. He identified fundamental limits of mathematics and theorem proving and computing and Artificial Intelligence.]*

[GOD34]
K. Gödel (1934).
On undecidable propositions of formal mathematical
systems. Notes by S. C. Kleene and J. B. Rosser on lectures
at the Institute for Advanced Study, Princeton, New Jersey, 1934, 30
pp. (Reprinted in M. Davis, (ed.), The Undecidable. Basic Papers on Undecidable
Propositions, Unsolvable Problems, and Computable Functions,
Raven Press, Hewlett, New York, 1965.)
*[Gödel introduced the first universal coding language.]*

[CHU]
A. Church (1935). An unsolvable problem of elementary number theory. Bulletin of the American Mathematical Society, 41: 332-333. Abstract of a talk given on 19 April 1935, to the American Mathematical Society.
Also in American Journal of Mathematics, 58(2), 345-363 (1 Apr 1936).
*[First explicit proof that the Entscheidungsproblem (decision problem) does not have a general solution.]*

[TUR]
A. M. Turing. On computable numbers, with an application to the Entscheidungsproblem. Proceedings of the London Mathematical Society, Series 2, 41:230-267. Received 28 May 1936. Errata appeared in Series 2, 43, pp 544-546 (1937).

[POS]
E. L. Post (1936). Finite Combinatory Processes - Formulation 1. Journal of Symbolic Logic. 1: 103-105.
Link.

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