mathematics

Jan Terlouw

Jan Terlouw 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 Jan Terlouw rather than just read about it. In short: Jan Cornelis Terlouw (15 November 1931 – 16 May 2025) was a Dutch politician, physicist and author. A member of the Democrats 66 (D66) party, he served as Deputy Prime Minister of the Netherlands from 1981 to 1982 under Prime Minister Dries van Agt.

Key takeaways

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

Reference excerpt

Jan Cornelis Terlouw (15 November 1931 – 16 May 2025) was a Dutch politician, physicist and author. A member of the Democrats 66 (D66) party, he served as Deputy Prime Minister of the Netherlands from 1981 to 1982 under Prime Minister Dries van Agt. Terlouw studied physics at the Utrecht University where he obtained his master's degree and then worked as a researcher at the FOM before finishing his thesis and obtaining his PhD in mathematics and physics. Terlouw worked as a nuclear physics researcher at the Massachusetts Institute of Technology (MIT) from February 1960 until April 1962, and for the Royal Institute of Technology (KTH) from August 1965 until December 1966. After the 1971 general election Terlouw was elected to the House of Representatives on 11 May 1971 and served as a frontbencher and spokesperson for economic affairs and science. After Party Leader and Parliamentary leader Hans van Mierlo announced he was stepping down, Terlouw was unanimously selected as his successor on 1 September 1973. For the 1977 and 1981 general elections, Terlouw served as lead candidate, and following a cabinet formation with Christian democratic Leader Dries van Agt and Labour Leader Joop den Uyl formed the second Van Agt cabinet, with Terlouw appointed Deputy Prime Minister and Minister of Economic Affairs, taking office on 11 September 1981. The cabinet fell just seven months into its term and was replaced by the caretaker third Van Agt cabinet, with Terlouw continuing his offices. For the 1982 general election, Terlouw again served as lead candidate but shortly thereafter announced he was stepping down as Leader on 8 September 1982. Terlouw continued to be active in politics and in December 1982 he was nominated as the next Secretary-General of the European Conference of Ministers of Transport (ECMT - evolved in 2006 into the International Transport Forum, ITF) serving from 30 January 1983 until 15 October 1991. In October 1991 Terlouw was nominated as the next Queen's Commissioner of Gelderland serving from 1 November 1991 until 1 December 1996. Terlouw also became active in the public sector, and worked as a professor of Urbanization at the University of Amsterdam from January 1997 until January 2000. After the Senate election of 1999 Terlouw was elected as a Member of the Senate serving from 8 June 1999 until 10 June 2003 and served as a frontbencher and spokesperson for the interior, economic affairs and defence. Terlouw retired from active politics at 71 but continued to be active in the public sector as a non-profit director and served on several state commissions (nl) and councils on behalf of the government, and worked as a professor of Literature at the Tilburg University from September 2003 until September 2004. Following his retirement Terlouw continued to be active as an advocate and activist for social norms, sustainable development, animal welfare and for more European integration. Terlouw was known for his abilities as a consensus builder and negotiator and continued to comment on political affairs in his final years. Terlouw was active as a prolific author since the 1970s, having written more than dozen young adult fiction books: his 1972 novel Winter in Wartime was adapted and released as a feature film in 2008.

Background

Early life and education Terlouw was born in Kamperveen, Overijssel and grew up in the Veluwe. He was the eldest son a family of five, having two younger brothers and two sisters. After high school, Terlouw studied at Utrecht University, where he obtained an MSc degree in physics in 1956, and subsequently a PhD degree in mathematics and physics in 1964.

Career After graduating from Utrecht University, he worked as a physics researcher in the Netherlands, the United States, and Sweden. After working for thirteen years, he became a politician, joining the Dutch House of Representatives (the lower house of the Dutch legislature) as a member of the Democraten 66 political party in 1970.

Personal life and death Terlouw was married to Alexandra van Hulst until her death on 23 August 2017. He was a father of four and grandfather to 12. Terlouw died in Twello on 16 May 2025, at the age of 93.

Publications Terlouw wrote 24 children's books, most notably Winter in Wartime (Oorlogswinter, 1972) and How to Become King (Koning van Katoren, 1971), both of which won the Gouden Griffel and have been made into motion pictures directed by Martin Koolhoven. Terlouw's books have been illustrated by various illustrators, including Dick van der Maat, Martijn van der Linden and Fiel van der Veen.

Electoral history

Honours and awards

Honours Commander of the Order of Orange-Nassau (Netherlands, 9 December 1982)

Honorary degrees Doctor honoris causa from the Vrije Universiteit Brussel (Belgium, 23 mei 2017)

Awards 1972 Gouden Griffel for the novel Koning van Katoren (How to Become King) 1973 Gouden Griffel for the novel Winter in Wartime 1990 Prize of the Netherlands Children's Jury for the novel The Figure-skater 2000 Prize of the Dutch Joung Jury for Eigen rechter (1988)

Notes

References

External links

Jan Terlouw at IMDb Official (in Dutch) Dr. J.C. (Jan) Terlouw Parlement & Politiek (in Dutch) Dr. J.C. Terlouw (D66) Eerste Kamer der Staten-Generaal

Illustrations

Worked examples

Example 1 — a first encounter with Jan Terlouw

Start with the simplest possible case. Write down what Jan Terlouw 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 Jan Terlouw 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 Jan Terlouw 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 Jan Terlouw

In research: Jan Terlouw 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 Jan Terlouw 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: Jan Terlouw is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1931 births, 2025 deaths, 20th-century Dutch educators, so understanding it makes those chapters shorter.
In everyday life: Look for Jan Terlouw 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 Jan Terlouw in 20 minutes

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

Frequently asked questions

What is Jan Terlouw in simple terms?

Why does Jan Terlouw 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 Jan Terlouw?

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 Jan Terlouw.