mathematics

Jacob Tsimerman

Jacob Tsimerman 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 Jacob Tsimerman rather than just read about it. In short: Jacob Tsimerman (born April 26, 1988) is a Soviet-born Canadian mathematician at the University of Toronto specialising in arithmetic geometry, algebraic geometry, and related areas. He was awarded the SASTRA Ramanujan Prize in the year 2015 in recognition for his work on the André–Oort conjecture and for his work in both analytic number theory and algebraic geometry.

Key takeaways

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

Reference excerpt

Jacob Tsimerman (born April 26, 1988) is a Soviet-born Canadian mathematician at the University of Toronto specialising in arithmetic geometry, algebraic geometry, and related areas. He was awarded the SASTRA Ramanujan Prize in the year 2015 in recognition for his work on the André–Oort conjecture and for his work in both analytic number theory and algebraic geometry. In 2026, he received the Fields Medal for his work on O-minimality, Griffiths' conjecture, and the André–Oort conjecture.

Early life and education Tsimerman was born on April 26, 1988 in Kazan, Soviet Union. In 1990, his family moved to Israel and then in 1996 to Canada. He attended the University of Toronto Schools for high school, where he represented Canada in the International Mathematical Olympiad in 2003 and 2004, winning gold medals both times with a perfect score in 2004. Tsimerman began his post-secondary studies at University College, University of Toronto, at the age of 16, where he graduated after two years in 2006 with a bachelor's degree in mathematics. He obtained his PhD from Princeton in 2011 under the guidance of Peter Sarnak.

Career Following his PhD, he had a postdoctoral position at Harvard University as a Junior Fellow of the Harvard Society of Fellows. In July 2014, he was awarded a Sloan Fellowship, and he started his term as assistant professor in the Department of Mathematics at the University of Toronto, where he is now a full professor. In 2018, Tsimerman was an invited speaker at the International Congress of Mathematicians (ICM). In 2019, he was awarded the Coxeter–James Prize by the Canadian Mathematical Society. He is also one of winners of the 2022 New Horizons in Mathematics Prize, associated with the Breakthrough Prize in Mathematics. He was awarded for "outstanding work in analytic number theory and arithmetic geometry, including breakthroughs on the André-Oort and Griffiths conjectures". In 2023, Tsimerman received the Ostrowski Prize. He was elected a Fellow of the Royal Society in 2025. Between 2025 and 2026, Tsimerman was a visiting professor at the Institute for Advanced Study. In 2026, Tsimerman was awarded the Fields Medal at ICM Philadelphia 2026 for his "contribution in the recasting of o-minimality as a fundamental method of arithmetic and complex algebraic geometry, and his role in the proof of many central conjectures including Griffiths' conjecture on the algebraicity of images of the period maps, and the André-Oort conjecture for Siegel modular varieties." He became the first faculty member at a Canadian university to win the Fields Medal. There, he announced he was joining OpenAI as a researcher in AI safety.

Research Together with Jonathan Pila, Tsimerman demonstrated the André–Oort conjecture for Siegel modular varieties. Later, he completed the proof of the André–Oort conjecture for the Shimura variety by reducing the problem to the averaged Colmez conjecture which was proved by Xinyi Yuan and Shou-Wu Zhang as well as independently by Andreatta, Goren, Howard and Madapusi-Pera. In 2021, Tsimerman, Pila and Ananth Shankar published a full proof of the André–Oort conjecture.

Notes

References

External links A Field Medalist Just Quits Math — Jacob Tsimerman⁠ on YouTube

Illustrations

Worked examples

Example 1 — a first encounter with Jacob Tsimerman

Start with the simplest possible case. Write down what Jacob Tsimerman 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 Jacob Tsimerman 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 Jacob Tsimerman 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 Jacob Tsimerman

In research: Jacob Tsimerman 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 Jacob Tsimerman 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: Jacob Tsimerman is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1988 births, 21st-century Canadian mathematicians, Academic staff of the University of Toronto Faculty of Arts and Science, so understanding it makes those chapters shorter.
In everyday life: Look for Jacob Tsimerman 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 Jacob Tsimerman in 20 minutes

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

Frequently asked questions

What is Jacob Tsimerman in simple terms?

Why does Jacob Tsimerman 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 Jacob Tsimerman?

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 Jacob Tsimerman.