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mathematics

Harry Lindgren

Harry Lindgren 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 Harry Lindgren rather than just read about it. In short: Harry Lindgren (25 June 1912 – 1 July 1992) was a British-Australian engineer, linguist and amateur mathematician. Early life Lindgren was born in Newcastle-upon-Tyne in England.

Key takeaways

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

Reference excerpt

Harry Lindgren (25 June 1912 – 1 July 1992) was a British-Australian engineer, linguist and amateur mathematician.

Early life Lindgren was born in Newcastle-upon-Tyne in England. In 1935 he emigrated to join his family in Perth, Australia. He received a BSc degree from the University of Western Australia and later became a Commonwealth Patent Officer. He married Eve Spokone, whom he had met at university, on 30 May 1941, the couple went on to have one daughter. Lindgren played violin in the Canberra Symphony Orchestra for a number of years.

Mathematics Lindgren published articles in several mathematical journals which culminated in his famous book 'Geometric Dissections' (Van Nostrand 1964), which explores techniques for devising and solving dissection puzzles. When published, his work was the only complete treatment of this subject in any language. This remained true for a third of a century.

Linguistics and later life In 1969, Lindgren published Spelling Reform: A New Approach (Alpha Books, 104 Bathurst St, Sydney 2000, Australia). This work outlines a proposal for introducing phoneme-by-phoneme adjustment of English spelling, in order that spellings may more accurately represent the sounds of the speech they denote. The book features several cartoons illustrating the absurdities of existing spellings. He spent five years writing the book. On 1 September 1971, Lindgren launched the Spelling Action Society (headquartered in Narrabundah, a suburb of Canberra) to promote his suggested reforms. He chose the name to share its initials with Scandinavia's SAS airline to acknowledge his Nordic ancestry. He published the newsletter Spelling Action under the society to promote use of his Spelling Reform step One (SR1). As Lindgren's health deteriorated in later life the newsletter was taken over by Gary Jimmieson (and later Doug Everingham). He died of a pulmonary embolism in Jindalee Nursing Home, Canberra.

References

Worked examples

Example 1 — a first encounter with Harry Lindgren

Start with the simplest possible case. Write down what Harry Lindgren 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 Harry Lindgren 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 Harry Lindgren 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 Harry Lindgren

In research
Harry Lindgren 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 Harry Lindgren 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
Harry Lindgren is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1912 births, 1992 deaths, 20th-century Australian linguists, so understanding it makes those chapters shorter.
In everyday life
Look for Harry Lindgren 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 Harry Lindgren in 20 minutes

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

Frequently asked questions

What is Harry Lindgren in simple terms?

Harry Lindgren (25 June 1912 – 1 July 1992) was a British-Australian engineer, linguist and amateur mathematician. Early life Lindgren was born in Newcastle-upon-Tyne in England.

Why does Harry Lindgren 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 Harry Lindgren?

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 Harry Lindgren.

Tags

  • 1912 births
  • 1992 deaths
  • 20th-century Australian linguists
  • 20th-century Australian mathematicians
  • 20th-century British linguists
  • Amateur mathematicians
  • Australian academic biography stubs
  • British emigrants to Australia
  • Engineers from Newcastle upon Tyne
  • English-language spelling reform advocates
  • Linguist stubs
  • Mathematician stubs

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