astronomy

Simion Stoilow

Simion Stoilow is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Simion Stoilow rather than just read about it. In short: Simion Stoilow or Stoilov (14 September [O.S. 2 September] 1887 – 4 April 1961) was a Romanian mathematician, creator of the Romanian school of complex analysis, and author of over 100 publications. Biography He was born in Bucharest, and grew up in Craiova.

Key takeaways

Simion Stoilow belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Simion Stoilow to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Simion Stoilow from memory before moving on to harder problems.

Reference excerpt

Simion Stoilow or Stoilov (14 September [O.S. 2 September] 1887 – 4 April 1961) was a Romanian mathematician, creator of the Romanian school of complex analysis, and author of over 100 publications.

Biography He was born in Bucharest, and grew up in Craiova. His father, Colonel Simion Stoilow, fought at the Battle of Smârdan in the Romanian War of Independence. After studying at the Obedeanu elementary school and the Carol I High School, Stoilow went in 1907 to the University of Paris, where he earned a B.S. degree in 1910 and a Ph.D. in Mathematics in 1916. His doctoral dissertation was written under the direction of Émile Picard. He returned to Romania in 1916 to fight in the Romanian Campaign of World War I, first in Dobrudja, then in Moldavia. After the war, he became professor of mathematics at the University of Iași (1919–1921) and the University of Cernăuți (1921–1939). He was an Invited Speaker of the International Congress of Mathematicians in 1920 at Strasbourg, in 1928 at Bologna, and in 1936 at Oslo. In 1928 he was awarded the Legion of Honour, Officer rank. In 1939 he moved to Bucharest, working first at the Polytechnic University of Bucharest, and from 1941 at the University of Bucharest, serving as rector from 1944 to 1946 and as dean of the Faculties of Mathematics and Physics from 1948 to 1951. From 1946 to 1948, he served as Romanian ambassador to France. In 1946 he was a member of the Romanian delegation at the Paris Peace Conference, headed by Gheorghe Tătărescu. In July 1947 he organized at Club de Chaillot the exhibit "L'art français au secours des enfants roumains"; Constantin Brâncuși participated, Tristan Tzara and Jean Cassou wrote the preface to the catalogue. In 1946 he was awarded the Order of the Star of Romania, Grand Officer rank and in 1948, the Order of the Star of the Romanian People's Republic, Second class.

Stoilow was elected corresponding member of the Romanian Academy in 1936, and full member in 1945, and later became president of the Physics and Mathematics section of the Academy. In 1949 he was the founding director of the Institute of Mathematics of the Romanian Academy, serving in that capacity until he died. Among his students at the University of Bucharest and at the Institute were Cabiria Andreian Cazacu, Romulus Cristescu, Martin Jurchescu, Ionel Bucur, and Aristide Deleanu, as well as Nicolae Boboc, Corneliu Constantinescu, and Aurel Cornea. Some of the first Romanian topologists who obtained their candidate’s theses were Stoilow’s students Tudor Ganea, Israel Berstein, Aristide Deleanu, Valentin Poénaru, and Kostake Teleman. In 1952, Stoilow was awarded the Order of the Star of the Romanian People's Republic, First class. Stoilow died in Bucharest in 1961 of a brain stroke. He was cremated at the Cenușa crematorium. Prior to the Romanian Revolution of 1989, his funeral urn was maintained in a crypt at the Carol Park Mausoleum.

Legacy The Institute of Mathematics of the Romanian Academy (closed in 1975 by a decree of Nicolae Ceaușescu, reopened in the immediate aftermath of the 1989 Revolution), is now named after him. The Simion Stoilow Prize is awarded every year by the Romanian Academy.

Work Siméon Stoilow (1916). Sur une classe de fonctions de deux variables définies par les équations linéaires aux dérivées partielles (PDF) (Thesis). Vol. VI u. 84 S. 4. Paris: Gauthier-Villars. JFM 46.1481.03. Siméon Stoïlow (1919). "Sur les singularités mobiles des intégrales des équations linéaires aux dérivées partielles et sur leur intégrale générale" (PDF). Annales Scientifiques de l'École Normale Supérieure. (3). 36: 235–262. doi:10.24033/asens.717. JFM 47.0946.01. Simion Stoïlow, "Leçons sur les principes topologiques de la théorie des fonctions analytiques", Gauthier-Villars, Paris, 1956. MR 0082545 Simion Stoïlow, "Œuvre mathématique", Éditions de l'Académie de la République Populaire Roumaine, Bucharest, 1964. MR 0168435

References

Cabiria Andreian Cazacu, "Sur l'œuvre mathématique de Simion Stoïlow", pp. 8–21, Lecture Notes in Mathematics, vol. 1013, Springer-Verlag, Berlin, 1983. MR 0738079 "Analysis and Topology: A Volume Dedicated to the Memory of S. Stoilow", edited by Cabiria Andreian Cazacu, Olli Lehto, and Themistocles M. Rassias, World Scientific Publishers, 1998. ISBN 981-02-2761-2

External links (in Romanian) Short biography (in Romanian) Short biography, at Obedeanu school

Illustrations

Worked examples

Example 1 — a first encounter with Simion Stoilow

Start with the simplest possible case. Write down what Simion Stoilow claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Simion Stoilow before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Simion Stoilow ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Simion Stoilow

In research: Simion Stoilow appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Simion Stoilow in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Simion Stoilow is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1887 births, 1961 deaths, 20th-century Romanian mathematicians, so understanding it makes those chapters shorter.
In everyday life: Look for Simion Stoilow outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Simion Stoilow” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Simion Stoilow in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Simion Stoilow means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Simion Stoilow out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Simion Stoilow in simple terms?

Why does Simion Stoilow matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Simion Stoilow?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Simion Stoilow.