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Jim Stasheff

Jim Stasheff 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 Jim Stasheff rather than just read about it. In short: James Dillon Stasheff (born January 15, 1936, New York City) is an American mathematician, a professor emeritus of mathematics at the University of North Carolina at Chapel Hill. He works in algebraic topology and algebra as well as their applications to physics.

Jim Stasheff — main illustration
Jim Stasheff — illustration

Key takeaways

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

Reference excerpt

James Dillon Stasheff (born January 15, 1936, New York City) is an American mathematician, a professor emeritus of mathematics at the University of North Carolina at Chapel Hill. He works in algebraic topology and algebra as well as their applications to physics.

Biography Stasheff did his undergraduate studies in mathematics at the University of Michigan, graduating in 1956. Stasheff then began his graduate studies at Princeton University; his notes for a 1957 course by John Milnor on characteristic classes first appeared in mimeographed form and later in 1974 in revised form book titled Characteristic Classes with Stasheff as a co-author. After his second year at Princeton, he moved to Oxford University on a Marshall Scholarship. Two years later in 1961, with a pregnant wife, needing an Oxford degree to get reimbursed for his return trip to the US, and yet still feeling attached to Princeton, he split his thesis into two parts (one topological, the other algebraic) and earned two doctorates, a D.Phil. from Oxford under the supervision of Ioan James and a Ph.D. later the same year from Princeton under the supervision of John Coleman Moore. From 1961 to 1962, Stasheff was a C.L.E. Moore instructor at the Massachusetts Institute of Technology. Then in 1962 joined the faculty of University of Notre Dame as an assistant professor; he was promoted to full professor there in 1968. He visited Princeton University from 1968 to 1969 and then stayed there the next year as a Sloan Fellow. Then in 1970 he moved to Temple University, where he held a position until 1978. In 1976, he joined the UNC faculty. He has also visited the Institute for Advanced Study, Lehigh University, Rutgers University, and the University of Pennsylvania. Stasheff was an editor of the Transactions of the American Mathematical Society from 1978 to 1981, and managing editor from 1979 to 1981. He has been married since 1959 and has two children.

Research

Stasheff's research contributions include the study of associativity in loop spaces and the construction of the associahedron (also called the Stasheff polytope), ideas leading to the theory of operads; homotopy theoretic approaches to Hilbert's fifth problem on the characterization of Lie groups; and the study of Poisson algebras in mathematical physics. In the 1960s he wrote fundamental papers on higher homotopy theory and homotopy algebras. He introduced A ∞ {\displaystyle A_{\infty }} , Stasheff algebras and Stasheff polytopes. In the 1980s he turned to the application of characteristic classes and other topological and algebraic concepts in mathematical physics, first in the algebraic structure of anomalies in quantum field theory, where he worked with among others, Tom Kephart and Paolo Cotta-Ramusino. He referred to the research field as cohomological physics.

Awards and honors In 2012 he became a fellow of the American Mathematical Society.

Selected publications Milnor, John W.; Stasheff, James D. (1974), Characteristic Classes, Annals of Mathematics Studies, vol. 76, Princeton, NJ: Princeton University Press, ISBN 0-691-08122-0 Stasheff, James D. (1963), "Homotopy associativity of H-spaces. I, II", Transactions of the American Mathematical Society, 108 (2): 275–292, 293–312, doi:10.2307/1993609, JSTOR 1993609, MR 0158400 Markl, Martin; Shnider, Steve; Stasheff, James D. (2002). Operads in algebra, topology and physics. Mathematical Surveys and Monographs. Vol. 96. Providence, RI: American Mathematical Society. ISBN 0-8218-2134-2. MR 1898414. Stasheff, James D. (2006). H-spaces from a Homotopy Point of View. Berlin: Springer.

References

External links Homepage

Illustrations

Jim Stasheff: Jim Stasheff
Jim Stasheff
Jim Stasheff: The three-dimensional Stasheff polytope. Its vertices represent the possible parenthesizations of a five-element sequence, and its edges represent applications of the associative property to these parenthesizations.
The three-dimensional Stasheff polytope. Its vertices represent the possible parenthesizations of a five-element sequence, and its edges represent applications of the associative property to these parenthesizations.

Worked examples

Example 1 — a first encounter with Jim Stasheff

Start with the simplest possible case. Write down what Jim Stasheff 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 Jim Stasheff 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 Jim Stasheff 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 Jim Stasheff

In research
Jim Stasheff 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 Jim Stasheff 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
Jim Stasheff is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1936 births, 20th-century American mathematicians, 21st-century American mathematicians, so understanding it makes those chapters shorter.
In everyday life
Look for Jim Stasheff 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 Jim Stasheff in 20 minutes

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

Frequently asked questions

What is Jim Stasheff in simple terms?

James Dillon Stasheff (born January 15, 1936, New York City) is an American mathematician, a professor emeritus of mathematics at the University of North Carolina at Chapel Hill. He works in algebraic topology and algebra as well as their applications to physics.

Why does Jim Stasheff 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 Jim Stasheff?

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 Jim Stasheff.

Tags

  • 1936 births
  • 20th-century American mathematicians
  • 21st-century American mathematicians
  • Alumni of the University of Oxford
  • Fellows of the American Mathematical Society
  • Living people
  • MIT School of Science faculty
  • Mathematicians from New York (state)
  • Princeton University alumni
  • Scientists from New York City
  • Sloan Research Fellows
  • Temple University faculty

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