mathematics

Marguerite Lehr

Marguerite Lehr 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 Marguerite Lehr rather than just read about it. In short: Marguerite Lehr (October 22, 1898 – December 14, 1987) was an American mathematician who studied algebraic geometry, humanism in mathematics, and mathematics education. Early life and education Born on October 22, 1898, to Margaret Kreuter and George Lehr in Baltimore, Marguerite Lehr attended Goucher College for her undergraduate education and graduated with a bachelor's degree in 1919.

Key takeaways

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

Reference excerpt

Marguerite Lehr (October 22, 1898 – December 14, 1987) was an American mathematician who studied algebraic geometry, humanism in mathematics, and mathematics education.

Early life and education Born on October 22, 1898, to Margaret Kreuter and George Lehr in Baltimore, Marguerite Lehr attended Goucher College for her undergraduate education and graduated with a bachelor's degree in 1919. After her undergraduate education, Lehr moved to Rome to study at the University of Rome for the 1923–1924 academic year, funded by the American Association of University Women and the M. Carey Thomas University Fellowship. In 1925, Lehr earned her Ph.D. at Bryn Mawr College.

Career and research After earning her doctorate, Lehr stayed at her alma mater, Bryn Mawr, as an instructor; she was promoted to associate lecturer in 1929, assistant professor in 1935, and associate professor in 1937. In 1955, she was made a full professor. While at Bryn Mawr, she had temporary or honorary appointments at several other universities. At Johns Hopkins University, she was an honorary fellow from 1931 to 1932; she was also a visiting fellow at Princeton University from 1956 to 1957. In 1958 she was given a traveling lectureship by the Mathematical Association of America and the National Science Foundation, and was funded to give lectures across the country. She also worked with the MAA and NBC to produce educational films about mathematics, and conducted a televised lecture course on mathematics in 1953 and 1954. While at Princeton, and for the following decade, she was a member of the Woodrow Wilson Fellowship Award committee. She was also a member of the International Federation of University Women awards committee. Lehr lectured at Swarthmore College in the summer of 1944, and researched at the Institut Henri Poincaré in Paris in 1950.

Honors and awards Lehr was honored by Goucher College for her work with a "distinguished citation" in 1954. She was a fellow of the American Association for the Advancement of Science, a member of the American Mathematical Society, the International Biometric Society, the Institute of Mathematical Statistics, and the Mathematical Association of America.

References

Illustrations

Worked examples

Example 1 — a first encounter with Marguerite Lehr

Start with the simplest possible case. Write down what Marguerite Lehr 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 Marguerite Lehr 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 Marguerite Lehr 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 Marguerite Lehr

In research: Marguerite Lehr 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 Marguerite Lehr 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: Marguerite Lehr is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1898 births, 1987 deaths, 20th-century American mathematicians, so understanding it makes those chapters shorter.
In everyday life: Look for Marguerite Lehr 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 Marguerite Lehr in 20 minutes

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

Frequently asked questions

What is Marguerite Lehr in simple terms?

Marguerite Lehr (October 22, 1898 – December 14, 1987) was an American mathematician who studied algebraic geometry, humanism in mathematics, and mathematics education. Early life and education Born on October 22, 1898, to Margaret Kreuter and George Lehr in Baltimore, Marguerite Lehr attended Gouc…

Why does Marguerite Lehr 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 Marguerite Lehr?

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 Marguerite Lehr.