mathematics

Hisashi Okamoto

Hisashi Okamoto 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 Hisashi Okamoto rather than just read about it. In short: Hisashi Okamoto (岡本久, Okamoto Hisashi, born 23 November 1956) is a Japanese applied mathematician, specializing in mathematical fluid mechanics and computational fluid dynamics. Okamoto graduated from the University of Tokyo in March 1979.

Key takeaways

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

Reference excerpt

Hisashi Okamoto (岡本久, Okamoto Hisashi, born 23 November 1956) is a Japanese applied mathematician, specializing in mathematical fluid mechanics and computational fluid dynamics. Okamoto graduated from the University of Tokyo in March 1979. In April 1981 he became a research associate to Hiroshi Fujita (known for the Fujita-Kato theorem) at the University of Tokyo. There in 1985 he received his Doctorate of Science with Fujita as advisor. For the academic year 1986–1987 Okamoto was a visiting fellow at the University of Minnesota's Institute for Mathematics and Its Applications. In August 1987 Okamoto became an associate professor in the University of Tokyo's Department of Applied Science. In 1988 he visited the National University of Singapore. At Kyoto University's Research Institute for Mathematical Sciences (RIMS), he became an associate professor in April 1990 and a full professor in April 1994. At RIMS he was Head of the Computer Science Research Laboratory from 2004 to 2005 and deputy director in 2006, 2009, and 2011. He is editor-in-chief of the Japan Journal of Industrial and Applied Mathematics (JJIAM). Okamoto is the author or co-author of over 100 articles in refereed journals or in books of conference proceedings. He wrote, with Mayumi Shōji, the 2001 monograph The mathematical theory of permanent progressive water-waves.

Awards and honors 1998 — Invited Speaker, International Congress of Mathematicians, Berlin 1998 2002 — Inoue Science Award 2011 — President of the East Asia SIAM, 2011–2012 2013 — Fellow of the Japan Society of Fluid Mechanics 2013 — Fellow of the Japan Society for Industrial and Applied Mathematics 2015 — Plenary Lecturer, Mathematical Society of Japan, September 2015. 2016 — Hiroshi Fujiwara Prize on Mathematical Science

References

Worked examples

Example 1 — a first encounter with Hisashi Okamoto

Start with the simplest possible case. Write down what Hisashi Okamoto 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 Hisashi Okamoto 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 Hisashi Okamoto 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 Hisashi Okamoto

In research: Hisashi Okamoto 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 Hisashi Okamoto 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: Hisashi Okamoto is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1956 births, 20th-century Japanese mathematicians, 21st-century Japanese mathematicians, so understanding it makes those chapters shorter.
In everyday life: Look for Hisashi Okamoto 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 Hisashi Okamoto in 20 minutes

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

Frequently asked questions

What is Hisashi Okamoto in simple terms?

Why does Hisashi Okamoto 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 Hisashi Okamoto?

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 Hisashi Okamoto.