computer science

Seinosuke Toda

Seinosuke Toda is a computer science 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 Seinosuke Toda rather than just read about it. In short: Seinosuke Toda (戸田誠之助, Toda Seinosuke; born January 15, 1959) is a computer scientist working at the Nihon University in Tokyo. Toda earned his Ph.D. from the Tokyo Institute of Technology in 1992, under the supervision of Kojiro Kobayashi.

Key takeaways

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

Reference excerpt

Seinosuke Toda (戸田誠之助, Toda Seinosuke; born January 15, 1959) is a computer scientist working at the Nihon University in Tokyo. Toda earned his Ph.D. from the Tokyo Institute of Technology in 1992, under the supervision of Kojiro Kobayashi. He was a recipient of the 1998 Gödel Prize for proving Toda's theorem in computational complexity theory, which states that every problem in the polynomial hierarchy has a polynomial-time Turing reduction to a counting problem.

Notes

Worked examples

Example 1 — a first encounter with Seinosuke Toda

Start with the simplest possible case. Write down what Seinosuke Toda claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, 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 Seinosuke Toda 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 Seinosuke Toda 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 Seinosuke Toda

In research: Seinosuke Toda appears in computer science 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 Seinosuke Toda 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: Seinosuke Toda is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1959 births, 20th-century Japanese mathematicians, 21st-century Japanese mathematicians, so understanding it makes those chapters shorter.
In everyday life: Look for Seinosuke Toda 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Seinosuke Toda” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Seinosuke Toda in 20 minutes

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

Frequently asked questions

What is Seinosuke Toda in simple terms?

Why does Seinosuke Toda matter?

Because it connects several computer science 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 Seinosuke Toda?

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 Seinosuke Toda.