mathematics

Patrice Ossona de Mendez

Patrice Ossona de Mendez is a mathematics 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 Patrice Ossona de Mendez rather than just read about it. In short: Patrice Ossona de Mendez is a French mathematician specializing in topological graph theory who works as a researcher at the Centre national de la recherche scientifique in Paris. He is editor-in-chief of the European Journal of Combinatorics, a position he has held since 2009.

Key takeaways

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

Reference excerpt

Patrice Ossona de Mendez is a French mathematician specializing in topological graph theory who works as a researcher at the Centre national de la recherche scientifique in Paris. He is editor-in-chief of the European Journal of Combinatorics, a position he has held since 2009.

Education and career Ossona de Mendez was born on 13 December 1966 in Paris. He represented France in the International Mathematical Olympiad in 1985, earning a bronze medal there. He studied at the École Normale Supérieure from 1986 until 1990, and completed his Ph.D. in 1994 from the School for Advanced Studies in the Social Sciences. His dissertation, jointly supervised by Rosenstiehl and Hubert de Fraysseix, concerned bipolar orientations of graphs. He has worked at CNRS since 1995, and earned a habilitation in 2009 from the University of Bordeaux 1. Together with Jaroslav Nešetřil, he received the 2025 Nerode Prize for his work on Sparsity for the papers Grad and classes with bounded expansion I. Decompositions, Grad and classes with bounded expansion II. Algorithmic aspects, First order properties on nowhere dense structures, and On nowhere dense graphs.

Book With Jaroslav Nešetřil, he is the author of the book Sparsity: Graphs, Structures, and Algorithms (Algorithms and Combinatorics 28, Springer, 2012), concerning the properties and applications of different types of sparse graph. This book was included in ACM Computing Reviews list of Notable Books and Articles of 2012.

See also Left-right planarity test Schnyder's theorem Bounded expansion

References

External links Home page Orcid profile

Illustrations

Worked examples

Example 1 — a first encounter with Patrice Ossona de Mendez

Start with the simplest possible case. Write down what Patrice Ossona de Mendez claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, 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 Patrice Ossona de Mendez 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 Patrice Ossona de Mendez 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 Patrice Ossona de Mendez

In research: Patrice Ossona de Mendez appears in mathematics 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 Patrice Ossona de Mendez 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: Patrice Ossona de Mendez is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1966 births, French mathematicians, Graph theorists, so understanding it makes those chapters shorter.
In everyday life: Look for Patrice Ossona de Mendez 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.

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How to study Patrice Ossona de Mendez in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Patrice Ossona de Mendez 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 Patrice Ossona de Mendez out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Patrice Ossona de Mendez in simple terms?

Why does Patrice Ossona de Mendez matter?

Because it connects several mathematics 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 Patrice Ossona de Mendez?

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 Patrice Ossona de Mendez.