David Hilbert


Quick Info

Born
23 January 1862
Wehlau, near Königsberg, Prussia (now Kaliningrad, Russia)
Died
14 February 1943
Göttingen, Germany

Summary
Hilbert's work in geometry had the greatest influence in that area after Euclid. A systematic study of the axioms of Euclidean geometry led Hilbert to propose 21 such axioms and he analysed their significance. He made contributions in many areas of mathematics and physics.

Biography

David Hilbert's father, Otto Hilbert, was the son of a judge who was a high ranking Privy Councillor. Otto was a county judge who had married Maria Therese Erdtmann, the daughter of Karl Erdtmann, a Königsberg merchant. Maria was fascinated by philosophy, astronomy and prime numbers. Otto Hilbert had a brother who was a lawyer and another who was the director of a . After Otto was promoted to become a senior judge, he and Maria moved to 13 Kirchenstrasse in Königsberg and this was the home in which David spent much of his childhood. He had a strict upbringing by his father who was a man who lived his life to a standard pattern, always walking the same way every day and only leaving Königsberg once a year for the annual family holiday. David was his parents' first child and only son. He was six years old when his sister Elsie was born.

The usual age for someone to begin schooling was six but David did not enter his first school, the Royal Friedrichskolleg, until he was eight years old. It is almost certain that his mother taught him at home until he was eight. The Friedrichskolleg, also known as the Collegium Fridericianum, had a junior section which David attended for two years before entering the gymnasium of the Friedrichskolleg in 1872. Although this was reputed to be the best school in Königsberg, the emphasis was on Latin and Greek with mathematics considered as less important. Science was not taught at all in the Friedrichskolleg. The main approach to learning was having pupils memorise large amounts of material, something David was not particularly good at. Perhaps surprisingly for someone who was to make a gigantic impact on mathematics, he did not shine at school. In later life he described himself as a "dull and silly" boy at the Friedrichskolleg. Although doubtless there is modesty in these words, nevertheless they probably reflect Hilbert's own feeling about his school days. In September 1879 he transferred from the Friedrichskolleg to the Wilhelm Gymnasium where he spent his final year of schooling. Here there was more emphasis on mathematics and the teachers encouraged original thinking in a way that had not happened at the Friedrichskolleg. Hilbert was much happier and his performance in all his subjects improved. He received the top grade for mathematics and his final report stated:-
For mathematics he always showed a very lively interest and a penetrating understanding: he mastered all the material taught in the school in a very pleasing manner and was able to apply it with sureness and ingenuity.
After graduating from the Wilhelm Gymnasium, he entered the University of Königsberg in the autumn of 1880. In his first semester he took courses on integral calculus, the theory of determinants and the curvature of surfaces. Then following the tradition in Germany at this time, in the second semester he went to Heidelberg where he attended lectures by . Returning to Königsberg for the start of session 1881-82, Hilbert attended lectures on and the theory of functions by . In the spring of 1882, returned to Königsberg after studying in Berlin. Hilbert and , who was also a doctoral student, soon became close friends and they were to strongly influence each others mathematical progress. was appointed to Königsberg to succeed in 1883 and was appointed as an extraordinary professor there in the spring of 1884. and Hilbert became close friends, another friendship which was important factor in Hilbert's mathematical development, while became Hilbert's thesis advisor. He received his oral examination on 11 December 1884 for his thesis entitled Über invariante Eigenschaften specieller binärer Formen, insbesondere der Kugelfunctionen . had suggested that Hilbert study invariant properties of certain algebraic forms and Hilbert showed great originality in devising an approach that had not envisaged. , after reading the thesis, wrote to Hilbert (see []):-
I studied your work with great interest and rejoiced over all the processes which the poor invariants had to pass through before they manage to disappear. I would not have supposed that such a good mathematical theorem could have been obtained in Königsberg.
On 7 February 1885 he defended two propositions in a public disputation. One of Hilbert's chosen propositions was on physics, the other on philosophy. This was the final stage of his doctorate, which was then duly awarded. He spent the month following the award of his doctorate taking, and passing, the so that he was qualified to teach in a Gymnasium, and he also attended 's geometry course on 's line geometry and 's sphere geometry, and he also attended 's lectures on modular functions. suggested that Hilbert make a research visit to Leipzig to speak with . Taking this advice, he went to Leipzig and attended 's lectures. He also got to know and . suggested that both Hilbert and should visit Erlangen and discuss their research with who was the leading expert on . However, the visit did not take place at that time. then told both and Hilbert that they should visit Paris. They both went in early 1886, Hilbert at the end of March. had given them instructions as to which of the Paris mathematicians they should visit and they did as he told them, alternately writing to about their experiences. One of the first mathematicians they visited was who returned their visit a few days later. The two young visitors read their letters to out loud to each other so that they would not both tell him the same things. He replied to each in turn, making clear that he was treating them equally. In Paris, gave a dinner for Hilbert and to which , and were invited. On this occasion the French mathematicians all spoke German out of politeness to their German guests who complained to afterwards that the mathematical conversation had been very superficial. They were also disappointed with their meeting with who they felt was too old for mathematical discussions. The mathematician with whom they seemed to get on best was . Although they considered him very old (he was 64), he was "extraordinarily friendly and hospitable" and discussed the big problems of invariant theory. Since they had found their visit especially useful, they returned to 's home for a second visit a few days later. It is clear that Hilbert's thoughts were entirely on mathematics during his time in Paris and he wrote nothing of any sightseeing. Towards the end of his visit he suffered an illness and was probably homesick. Certainly by the spring of 1886 he was in good spirits as he returned to Germany. On his way back to Königsberg he visited Göttingen, where was about to take up the chair, where he met . Telling that he was next going to Berlin, Hilbert was advised to expect a cold reception by . However, Hilbert described his welcome in Berlin as very friendly.

From Berlin, Hilbert continued back to Königsberg where he prepared to submit his paper on invariant theory. He also had to give an inaugural lecture in the main auditorium of the Albertina and, from the two options offered by Hilbert, he was asked to deliver the lecture The most general periodic functions. had told Hilbert that Königsberg may not be a good place for him to but Hilbert was happy to do so. He wrote to (see for example []):-
I am content and full of joy to have decided myself for Königsberg. The constant association with Professor and, above all, with is not less interesting than it is advantageous to myself and stimulating. The bad part about Königsberg being so far away from things I hope I will be able to overcome by making some trips again next year, and perhaps then I will get to meet Herr .
He was a member of staff at Königsberg from 1886 to 1895, being a until 1892, then as Extraordinary Professor for one year before being appointed a full professor in 1893. The tour that he spoke about after habilitating at Königsberg happened in 1888 []:-
... he set off in March 1888 on a tour of several leading mathematical centres in Germany, including Berlin, Leipzig, and Göttingen. During the course of a month, he spoke with some twenty mathematicians from whom he gained a stimulating overview of current research interests throughout the country.
In Berlin he met and who presented the young Hilbert with two rather different views of the future. Next, in Leipzig, he finally met []:-
... the two hit it off splendidly, as both loved nothing more than to talk about mathematics.
Hilbert spent eight days in Göttingen before returning to Königsberg. He married his second cousin, Käthe Jerosch, on 12 October 1892; they had one son Franz Hilbert born on 11 August 1893.

In 1892 moved from Göttingen to Berlin to occupy 's chair and wanted to offer Hilbert the vacant Göttingen chair. However failed to persuade his colleagues and was appointed to the chair. was probably not too unhappy when moved to a chair at Strasbourg three years later since on this occasion he was successful in his aim of appointing Hilbert. So, in 1895, Hilbert was appointed to the chair of mathematics at the University of Göttingen, where he continued to teach for the rest of his career.

Hilbert's eminent position in the world of mathematics after 1900 meant that other institutions would have liked to tempt him to leave Göttingen and, in 1902, the University of Berlin offered Hilbert 's chair. Hilbert turned down the Berlin chair, but only after he had used the offer to bargain with Göttingen and persuade them to set up a new chair to bring his friend to Göttingen.

As we saw above, Hilbert's first work was on invariant theory and, in 1888, he proved his famous Basis Theorem. Twenty years earlier had proved the finite basis theorem for binary forms using a highly computational approach. Attempts to generalise 's work to systems with more than two variables failed since the computational difficulties were too great. Hilbert himself tried at first to follow 's approach but soon realised that a new line of attack was necessary. He discovered a completely new approach which proved the finite basis theorem for any number of variables but in an entirely abstract way. Although he proved that a finite basis existed his methods did not construct such a basis.

Hilbert submitted a paper proving the finite basis theorem to Mathematische Annalen. However was the expert on invariant theory for Mathematische Annalen and he found Hilbert's revolutionary approach difficult to appreciate. He refereed the paper and sent his comments to :-
The problem lies not with the form ... but rather much deeper. Hilbert has scorned to present his thoughts following formal rules, he thinks it suffices that no one contradict his proof ... he is content to think that the importance and correctness of his propositions suffice. ... for a comprehensive work for the 'Annalen' this is insufficient.
However, Hilbert had learnt through his friend about 's letter to and Hilbert wrote himself to in forceful terms:-
... I am not prepared to alter or delete anything, and regarding this paper, I say with all modesty, that this is my last word so long as no definite and irrefutable objection against my reasoning is raised.
At the time received these two letters from Hilbert and , Hilbert was an assistant lecturer while was the recognised leading world expert on invariant theory and also a close friend of 's. However recognised the importance of Hilbert's work and assured him that it would appear in the Annalen without any changes whatsoever, as indeed it did.

Hilbert expanded on his methods in a later paper, again submitted to the Mathematische Annalen and , after reading the manuscript, wrote to Hilbert saying:-
I do not doubt that this is the most important work on general algebra that the 'Annalen' has ever published.
In 1893 while still at Königsberg Hilbert began a work Zahlbericht on . The German Mathematical Society requested this major report three years after the Society was created in 1890. The Zahlbericht (1897) is a brilliant synthesis of the work of , and but also contains a wealth of Hilbert's own ideas. The ideas of the present day subject of 'Class field theory' are all contained in this work. Rowe, in [], describes this work as:-
... not really a Bericht in the conventional sense of the word, but rather a piece of original research revealing that Hilbert was no mere specialist, however gifted. ... he not only synthesized the results of prior investigations ... but also fashioned new concepts that shaped the course of research on algebraic number theory for many years to come.
An extract from Hilbert's Preface to Zahlbericht is quote 7 in our collection Quotes by and about Hilbert at THIS LINK.

Hilbert's work in geometry had the greatest influence in that area after . A systematic study of the axioms of Euclidean geometry led Hilbert to propose 21 such axioms and he analysed their significance. He published Grundlagen der Geometrie in 1899 putting geometry in a formal axiomatic setting. The book continued to appear in new editions and was a major influence in promoting the axiomatic approach to mathematics which has been one of the major characteristics of the subject throughout the 20th century.

Reviews of Grundlagen der Geometrie and other of Hilbert's books are at THIS LINK.

More about Grundlagen der Mathematik is at THIS LINK.

Hilbert's famous 23 Paris problems challenged (and still today challenge) mathematicians to solve fundamental questions. Hilbert's famous speech The Problems of Mathematics was delivered to the Second International Congress of Mathematicians in Paris. It was a speech full of optimism for mathematics in the coming century and he felt that open problems were the sign of vitality in the subject:-
The great importance of definite problems for the progress of mathematical science in general ... is undeniable. ... [for] as long as a branch of knowledge supplies a surplus of such problems, it maintains its vitality. ... every mathematician certainly shares ..the conviction that every mathematical problem is necessarily capable of strict resolution ... we hear within ourselves the constant cry: There is the problem, seek the solution. You can find it through pure thought...
Hilbert's problems included the continuum hypothesis, the well ordering of the reals, , the transcendence of powers of algebraic numbers, the hypothesis, the extension of 's principle and many more. Many of the problems were solved during this century, and each time one of the problems was solved it was a major event for mathematics.

For more information about Hilbert's problems see THIS LINK.

Today Hilbert's name is often best remembered through the concept of . , writing in [], explains Hilbert's work which led to this concept:-
Hilbert's work in in about 1909 led directly to 20th -century research in functional analysis (the branch of mathematics in which functions are studied collectively). This work also established the basis for his work on infinite-dimensional space, later called Hilbert space, a concept that is useful in mathematical analysis and quantum mechanics. Making use of his results on integral equations, Hilbert contributed to the development of mathematical physics by his important memoirs on kinetic gas theory and the theory of radiations.
Many have claimed that in 1915 Hilbert discovered the correct field equations for general relativity before Einstein but never claimed priority. The article [] however, shows that this view is in error. In this paper the authors show convincingly that Hilbert submitted his article on 20 November 1915, five days before submitted his article containing the correct field equations. 's article appeared on 2 December 1915 but the proofs of Hilbert's paper (dated 6 December 1915) do not contain the field equations.

As the authors of [] write:-
In the printed version of his paper, Hilbert added a reference to 's conclusive paper and a concession to the latter's priority: "The differential equations of gravitation that result are, as it seems to me, in agreement with the magnificent theory of general relativity established by in his later papers". If Hilbert had only altered the dateline to read "submitted on 20 November 1915, revised on [any date after 2 December 1915, the date of 's conclusive paper]," no later priority question would have arisen.
In 1934 and 1939 two volumes of Grundlagen der Mathematik were published which were intended to lead to a 'proof theory', a direct check for the consistency of mathematics. 's paper of 1931 showed that this aim is impossible.

See THIS LINK.

Hilbert contributed to many branches of mathematics, including invariants, algebraic number fields, , integral equations, mathematical physics, and the calculus of variations. His mathematical abilities were nicely summed up by , his first student []:-
In the analysis of mathematical talent one has to differentiate between the ability to create new concepts that generate new types of thought structures and the gift for sensing deeper connections and underlying unity. In Hilbert's case, his greatness lies in an immensely powerful insight that penetrates into the depths of a question. All of his works contain examples from far-flung fields in which only he was able to discern an interrelatedness and connection with the problem at hand. From these, the synthesis, his work of art, was ultimately created. Insofar as the creation of new ideas is concerned, I would place higher, and of the classical great ones, , , and . But when it comes to penetrating insight, only a few of the very greatest were the equal of Hilbert.
Among Hilbert's students were , the famous world chess champion , and . But the list includes many other famour names including , , , , , , , , , , , , , , , , , , and .

In 1930 Hilbert retired but only a few years later, in 1933, life in Göttingen changed completely when the Nazis came to power and Jewish lecturers were dismissed. By the autumn of 1933 most had left or were dismissed. Hilbert, although retired, had still been giving a few lectures. In the winter semester of 1933-34 he gave one lecture a week on the foundations of geometry. After he finished giving this course he never set foot in the Institute again. In early 1942 he fell and broke his arm while walking in Göttingen. This made him totally inactive and this seems to have been a major factor in his death a year after the accident.

Hilbert received many honours. In 1905 the Hungarian Academy of Sciences gave a special citation for Hilbert. He was awarded the Prize in 1910 and elected a fellow of the Royal Society of London in 1928. In 1930 Hilbert retired and the city of Königsberg made him an honorary citizen of the city. He gave an address which ended with six famous words showing his enthusiasm for mathematics and his life devoted to solving mathematical problems:-
Wir müssen wissen, wir werden wissen - We must know, we shall know.
See quote 3 at THIS LINK.

In 1939 he was awarded the prize by the Swedish Academy of Sciences. He shared this Prize with . Hilbert was elected an honorary member of the London Mathematical Society in 1901 and of the German Mathematical Society in 1942.

For quotes which describe Hilbert's personality and hobbies see 5 and 10 at THIS LINK.


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Written by J J O'Connor and E F Robertson
Last Update November 2014