Keio University

Communication Among Mathematicians

Participant Profile

  • Hitoshi Nakada

    Hitoshi Nakada

What does mathematical research entail? What kind of image comes to mind? Perhaps you picture someone sitting at a desk, endlessly calculating on paper, or someone pacing around a room alone, muttering to themselves, etc. These images are perhaps both right and wrong.

My research is in a field where analysis, probability theory, number theory, and geometry intersect. When you roll a die many times, the outcomes are not regular but random. However, if you repeat it a great many times, each face appears with a frequency close to 1/6. In other words, we can find regularity within irregularity. On the other hand, even in physical phenomena where motion is completely determined once it starts, the movement can sometimes be so complex that it appears incredibly random. Mathematically abstracting these concepts expands the range of problems we can handle, leading to issues like approximating irrational numbers with rational numbers or problems in non-Euclidean geometry. The fascinating thing about mathematics is that seemingly completely different phenomena can be explained by the same logic.

In areas of mathematics where various fields intersect, it is very difficult for one person to cover everything. In such cases, mathematical research is not just about locking oneself away and working alone, as I described at the beginning. Today, quite a few mathematicians tend not to keep the problems they are thinking about secret (though the degree varies) and actively discuss their incomplete ideas with their peers. They complete their research through free discussion, saying things like, "I don't understand this part," or "What if we try to prove that with this idea?"

Figure 1: A discussion with a research group in France.
Figure 2: The whiteboard after a discussion with a collaborator.

Gakumon no susume (An Encouragement of Learning) (Research Introduction)

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Gakumon no susume (An Encouragement of Learning) (Research Introduction)

Showing item 1 of 3.