Gyula Bereznai

Gyula Bereznai (1 May 1921 – 6 September 1990) was a Hungarian mathematician and former head of department at a Teacher Training College in Nyíregyháza.

Gyula Bereznai
Born(1921-05-01)1 May 1921
Died6 September 1990(1990-09-06) (aged 69)
Nyíregyháza, Hungary
NationalityHungarian
Alma materEötvös Loránd University, Budapest
Known forBereznai Gyula
AwardsEmanuel Beke memorial prize
Scientific career
FieldsMathematics
InstitutionsCollege of Nyíregyháza

Biography

He was born in Sátoraljaújhely on 1 May 1921. He completed his elementary school in Tornyospálca, the secondary school in Kisvárda. His studies at the University of Debrecen were interrupted by the war (captivity). After six years in prison, he received a degree in mathematics from Eötvös Loránd University, Budapest. After the Nyíregyháza Vocational School and the Kölcsey Grammar School, he was admitted to the mathematics department of the Bessenyei György Teacher Training College in 1962. From 1969 to 1983 he was head of the department. For more than two decades he taught the future generation of teachers the basics of mathematical analysis, to whom he tried to pass on his knowledge and experience, and he was always happy to share it with his colleagues. Besides his professional security, he tried to shape his students with his own high standards. He was loved and respected by his colleagues and students, but the same can be said of mathematics teachers in the county, for whom he has organized and held numerous advanced lectures. He was not an ordinary individual, he was a true, well-educated teacher who was proficient not only in mathematics but also in physics, chemistry, and philosophy. His work is marked by numerous professional and methodological publications. He has written and edited several books and examples.

Work

His specialty was mathematical analysis.
Former member of the editorial board of Teaching Mathematics.
The Mathematical Competition named after Gyula Bereznai has been held annually since 1991.[1]

Quote from the publication A Simple Convergence Criterion:[2]

Theorem: If there is a real for a positive numeric string and a natural such that every time , each time
,
then the series is convergent. And if
,
then the series is divergent.

Thus Bereznai's theorem is:

Let be a sequence of positive numbers, such that there exists
with . Then the series is convergent.
If , then the series is divergent.

It is known that Gyula Bereznai's method is more effective than the so-called D'Alembert quotient, which is most commonly used to decide the positive convergence of numerical lines and the so-called Raabe-Duhamel Method. That is, Gyula Bereznai's result, among other things, provides a useful tool for the study of a very intensively researched branch of mathematics, harmonic analysis. (Dr. Habil. György Gát)[3]

One of his students, who had good results in other subjects, asked, "Mr. professor, is it because I am weak in maths? can I be a minister? " Uncle Gyuszi didn't think twice about answering: "Sure, you can be a minister, why not?"

Awards

Books

Notes

  1. Bereznai Gyula Matematikaverseny
  2. Bereznai Gyula: Egy egyszerű konvergenciakritérium. – In: Acta Academiae Paedagogicae Nyíregyháziensis, ISSN 0133-882X, 1973. Matematika, 19–24. p.
  3. "University of Debrecen Mathematical Institute". Archived from the original on 7 July 2019. Retrieved 14 November 2019.
  4. Pitagorasz tétele OSZK Tankönyvkiadó, 1970 (Amicus: 1259762)
  5. Dr.László Filep – Bereznai Gyula: A számírás története, Gondolat Kiadó, 1982, ISBN 9632810708
  6. Bereznai Gyula – Dr.Varecza ÁrpádDr.Rozgonyi Tibor Archived 31 July 2019 at the Wayback Machine: Tanárképző főiskolák matematika versenyei (1952–1970:ISBN 9789631736274; 1971–1979:ISBN 9789631761597; 1980–1985:ISBN 9789631816068)
    Tanárképző főiskolák országos matematika versenyei: (ISBN 9789631736267)

References

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