Anton Kazimirovich Suschkevich
Born: 23 January 1889 in Borisoglebsk, Russia
Died: 30 August 1961 in Kharkov, Ukraine
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First let us note that Anton Kazimirovich Suschkevich's family name is transliterated in several different ways. These include Sushkevich, Suskevic, and Suschkewitsch, in addition to the form Suschkevich that we shall use throughout this biography. His father, Kazimir Suschkevich, was a railway engineer. This seems to have been of sufficiently high status that the family were quite well-off and certainly able to afford a top quality education for their son. As he was growing up, Suschkevich had two passions, one being mathematics and the other being music. Of course, this was not unusual for many top mathematicians struggled to choose between mathematics and music in their youth. Those like Suschkevich who chose mathematics almost all continued their interest in music throughout their lives. At age seventeen, when he had completed his schooling in Russia, Suschkevich still wanted to keep both his interest in mathematics and his interest in music open. He went to Berlin in 1906 and there he studied mathematics at the University of Berlin while, at the same time, he studied the cello at the Stern Conservatory in that city. This famous music school had been founded by Julius Stern (1820-1883) in 1850 and when Suschkevich studied there it was located in the Berlin Philharmonic concert hall on Bernburger Strasse in Berlin-Kreuzberg. In fact he was highly proficient in two instruments, both the cello and the piano.
At the University of Berlin, Suschkevich had many talented teachers. He attended lectures by Georg Frobenius, Issai Schur and Hermann Schwarz. For example, he attended the two courses Differential calculus and Integral calculus by Hermann Schwarz, Number theory by Frobenius, and Algebra by Schur. After two years studying at both the University and at the Stern Conservatory, he made the decision that he would concentrate on mathematics. He finished his studies at the Conservatory in 1908 but continued studying at the University until 1911. Examples of courses he attended at this stage in his career are: Determinants, by Frobenius in the summer of 1908; Algebra I and Algebra II by Frobenius in 1908-09; Ordinary differential equations, by Schur in the summer of 1909; Chebyshev's Theorem, by Frobenius in November 1909; Bernoulli numbers by Frobenius in the summer of 1910, and Matrices, by Frobenius in the winter of 1910-11. He also studied applied mathematics courses by Max Planck: General mechanics, in the winter 1909-1910, Mechanics of deformable bodies, in the summer of 1910, Theory of electricity and magnetism, in the winter of 1910-1911, and Theory of optics, in the summer of 1911. We should note two things of particular importance to Suschkevich's future mathematical studies from this time in Berlin. One was the lectures by Frobenius whose approach, putting groups in an abstract setting yet not seeing abstraction as an end in itself, had a large influence on Suschkevich. Frobenius took this approach because he felt that it led to greater clarity and precision. The second thing to note from Suschkevich's time in Berlin is his meeting with Emmy Noether. After Suschkevich returned to Russia, he continued to correspond with Emmy Noether for many years.
After graduating from the University of Berlin in 1911, Suschkevich returned to Russia. Of course he had experienced a top quality education in Berlin but at this time foreign qualifications were not recognised in Russia so Suschkevich had to take a Russian degree. He studied at St Petersburg University, graduating in 1913. He had planned to return to Germany to study further but, in the summer of 1914, international tensions grew considerably following the assassination of the Austrian Archduke Ferdinand by a Bosnian Serb. By the end of July Russia was mobilising its forces and by August 1914 Russia and Germany were at war, ending Suschkevich's hopes of returning to Germany. Instead he went to Kharkov (now Kharkiv) in the Ukraine where he began teaching in secondary schools. However, he had not given up on his aim of becoming a university professor and so, in parallel with his work as a mathematics teacher, he studied for his Master's Degree (equivalent to a Ph.D.). He submitted his dissertation to Kharkov University in 1917 and was awarded the degree. However, the Russian Revolution made the following years extremely difficult. Ukraine declared itself an independent state in January 1918 but an agreement between the Bolshevik government and Germany saw German troops occupy Ukraine. The Bolsheviks established Kharkov as the capital of the Ukrainian Socialist Soviet Republic in 1919 while Kiev was the capital for those trying to establish an independent Ukraine. Suschkevich began teaching at Kharkov University in 1918 and, at the same time, he began working towards his doctorate (comparable in level with the D.Sc. or habilitation). He writes in that dissertation :-
My research in this subject started in 1918 and, consequently, took place in very difficult times, often interrupted for longer or shorter periods of time for reasons beyond my control.In 1921 Suschkevich went to Voronezh, in western Russia, where he began teaching at the university. This city was the main town of the district in which his hometown of Borisoglebsk was situated (about 200 km away). Voronezh University had been founded three years earlier by staff and students from the University of Tartu who had left following the German occupation of Estonia. Suschkevich submitted his 80-page dissertation Theory of operations as the general theory of groups (Russian) to Voronezh University in 1922. It was not examined until 1926 when it was approved by Sergei Bernstein and Otto Yulyevich Schmidt. The dissertation contained a remarkable study of semigroups and other generalisations of groups which is described in detail in . The Introduction reviews the axiomatic approach to group theory and generalisations up to 1914. The outbreak of World War I in that year prevented him having access to any books and papers written after that date. He discusses the work of William Burnside, Leonard E Dickson, Walther von Dyck, Georg Frobenius, Otto Hölder, Edward Huntington, Leopold Kronecker, George A Miller, Eliakim H Moore, Eugen Netto, James Pierpont, J-A de Séguier (1862-1937), Heinrich Weber and Alfred Young. The dissertation contains a wealth of results in the theory of semigroups and quasigroups. We refer the reader to  for a detailed discussion of the contents but we give one example of the remarkable nature of these contributions. This is in Chapter 6 entitled 'Non-uniquely invertible groups' which is devoted to the study of semigroups. In this Chapter there is an excellent contribution to the major structure theorem for algebraic semigroup theory which today is known as the Rees Theorem (named after David Rees) which classifies completely 0-simple semigroups. The authors of  explain that:-
... the content of this dissertation [is] surprisingly rich both in results and ideas. It is not an exaggeration to say that it was ahead of its time by 30-40 years. It contains ideas and results in the theory of semigroups, the theory of quasigroups and the theory of groupoids which have been fully appreciated and developed only in the post war years. Many of these results were rediscovered and only rarely the authors of such results noticed that they had a predecessor - A K Suschkevich. Of course, the reason for it is that it rarely occurred to anyone that in the twenties and thirties, results so near to the spirit of the modern theory of semigroups could be published.While at Voronezh University, Suschkevich began publishing in a number of areas. For example he published On a theorem of Weierstrass (Russian) (1923) on analysis, On methods of teaching mathematics in secondary school (Russian) (1926) on mathematical education, Über die Darstellung der eindeutig nicht umkehrbaren Gruppen mittelst der verallgemeinerten Substitutionen (1926) and Sur quelques cas des groupes finis sans la loi de l'inversion univoque (1927) on groups, and he produced the set of lithographed lecture notes Theory of definite integrals (Russian) (1929). In 1928 he published the 20-page paper Über die endlichen Gruppen ohne das Gesetz der eindeutigen Umkehrbarkeit in Mathematische Annalen. Christopher Hollings writes :-
Early on in their study, semigroups tended to be approached from one of two different directions: either by the dropping of selected axioms from a group, or by dropping an entire operation (namely, addition) from a ring. Judging by the introduction to his 1928 paper, Suschkevich's approach seems to have been the latter: he states his goal as being the development of an abstract theory for certain types of finite semigroups which was analogous to that given by Wedderburn (1907) for linear algebras. However, his set-up was very much 'group-axiomatic' in spirit; he drew upon the notation of his erstwhile lecturer Frobenius (1895). Suschkevich defined his objects of study to be finite 'groups' in which the elements do not necessarily have unique inverses: the 'endliche Gruppen ohne das Gesetz der eindeutigen Umkehrbarkeit' of his title. Suschkevich's own rendering into English of 'das Gesetz der eindeutigen Umkehrbarkeit' was 'the rule of uniform reversibility'. In modern terminology, this rule is simply cancellativity: if either ac = bc or ca = cb, then a = b.In 1929 Suschkevich returned to Kharkov where he taught at the University as well as being appointed to the recently founded Ukrainian Mathematics and Mechanics Research Institute. In the same year he was appointed as a professor in the Kharkov Geodetic Institute. In 1933 he was appointed to the chair of algebra and number theory at Kharkov University. Despite the brilliance of his contributions and the remarkable development of an area many years before others realised its importance, still Suschkevich made an unfortunate error. This was in a paper he published in 1935 with the title On the extension of a semigroup to a whole group (Russian). In this paper he claimed to have proved that every cancellative semigroup can be embedded in a group. Aleksandr Gennadievich Kurosh wrote a review of the paper in which he pointed out several gaps in the proof that Suschkevich presented. In a response, Suschkevich claimed that the gaps could be easily filled and included the "theorem" in his wonderful monograph Theory of generalised groups (Russian) (1937). Anatoly Ivanovich Malcev seemed to have proved beyond doubt that Suschkevich's result was wrong when he produced an example of a cancellative semigroup which could not be embedded in a group. At first Suschkevich seemed reluctant to accept his mistake but eventually did so and removed any reference to his 1935 paper from his publication list.
We must not let this episode in any way diminish the credit that is due to Suschkevich. Other factors meant that Theory of generalised groups (Russian) failed to have the impact on the development of semigroup theory that it might otherwise have done :-
... this book is not readily available today, as there are very few copies remaining; the majority of copies were held in Kharkov, a city which changed hands several times during the Second World War, and which suffered greatly as a consequence. The unavailability of his book certainly has not helped the dissemination of Suschkevich's work.Suschkevich's contributions to mathematics extend to many other significant works in a variety of different areas. His textbook Foundations of higher algebra was published first in Russian in 1923, then in Ukrainian in 1931. Several later editions of the work in both Russian and Ukrainian appeared. Another textbook which ran to several editions in both Russian and Ukrainian was Number theory first published in 1932. He wrote several important works on the history of mathematics and also lectured on the topic. For example he produced copies of his lectures on the history of mathematics as Short Course of the History of Mathematics (Russian) (1939) and published the 214-page paper Materials for the history of algebra in Russia in the 19th century and early 20th century (Russian) (1951). He was honoured for his contributions to the history of mathematics by the Soviet Association of Science Historians who awarded him their Euler Medal in 1957. Let us mention a few of his later papers (all in Russian): Investigations on infinite substitutions (1940); On the construction of some types of groups of infinite matrices (1948); On a type of algebras of infinite matrices (1949); On an infinite algebra of triangular matrices (1950); and An algebra defined as an infinite direct sum of rings (1952).
The authors of  note that:-
Anton Kazimirovich Suschkevich was an excellent lecturer who attracted many young people to this work in the field of algebra. His students work in many universities.In the obituary  it is noted that:-
Despite suffering a serious illness, Anton Kazimirovich did not stop his usual duties in the last months of his life, having students come to his house. Aware that he did not have long to live, he hurried to complete the new edition of his book on number theory to which he attached great importance. Anton Kazimirovich failed to finish the task, but his intentions were known to the disciples of the deceased and the work will be completed by them. The Kharkov Mathematical Society mourns the death of leading member who has always been a sensitive friend, a great teacher and a great educator of youth.Finally, we note that Suschkevich was honoured at the '7th International Algebraic Conference in Ukraine' held in August 2009 in Kharkov which was "dedicated to the 120th anniversary of Professor Anton Kazimirovich Suschkevich".
Article by: J J O'Connor and E F Robertson
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