mathematics

Helene Stähelin

Helene Stähelin 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 Helene Stähelin rather than just read about it. In short: Helene Stähelin (18 July 1891 – 30 December 1970) was a Swiss mathematician, teacher, and peace activist. From 1948 to 1967, she was president of the Swiss section of the Women's International League for Peace and Freedom and its representative in the Swiss Peace Council.

Key takeaways

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

Reference excerpt

Helene Stähelin (18 July 1891 – 30 December 1970) was a Swiss mathematician, teacher, and peace activist. From 1948 to 1967, she was president of the Swiss section of the Women's International League for Peace and Freedom and its representative in the Swiss Peace Council.

Life Born in Wintersingen, Stähelin was one of twelve children of the parson Gustav Stähelin (1858–1934) and his wife Luise (née Lieb). In 1894, the family moved from Wintersingen to Allschwil. Stähelin attended the Töchterschule in Basel, the University of Basel, and the University of Göttingen. In 1922, she became teacher of mathematics and natural sciences at the Töchterinstitut in Ftan. In 1924, she obtained her DPhil from Basel University. Her dissertation was advised by Hans Mohrmann and Otto Spiess. In 1926, she became a member of the Swiss Mathematical Society. Between 1934 and 1956, Stähelin worked as teacher at the Protestant secondary school in Zug. After her pensioning she returned to Basel, where she assisted for several years in Otto Spiess' editing of the Bernoulli family letters. Being a pacifist, Stähelin committed herself to the Women's International League for Peace and Freedom (IFFF) and its struggle against scientific warfare. She was president of the IFFF's Swiss section from 1947–1967, during which the main issues were the United Nations, nuclear weapons, and the Vietnam War. Due to her peace activism, she was watched by Swiss authorities in the mid 1950s; her file at the Swiss Public Prosecutor General was kept secret until 1986. Stähelin advocated for women's suffrage in Switzerland, though she died before women were able to vote. She died in Basel.

Illustrations

Worked examples

Example 1 — a first encounter with Helene Stähelin

Start with the simplest possible case. Write down what Helene Stähelin 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 Helene Stähelin 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 Helene Stähelin 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 Helene Stähelin

In research: Helene Stähelin 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 Helene Stähelin 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: Helene Stähelin is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1891 births, 1970 deaths, 20th-century Swiss mathematicians, so understanding it makes those chapters shorter.
In everyday life: Look for Helene Stähelin 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 Helene Stähelin in 20 minutes

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

Frequently asked questions

What is Helene Stähelin in simple terms?

Why does Helene Stähelin 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 Helene Stähelin?

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 Helene Stähelin.