Greeting
From the Division ManagerIn the pure mathmatics, there are three research fields of the Algebra, the Analysis and the Geometry mainly. In the geometry, there are three fields of the differential geometry, the topology and the Algebraic Geometry.
The differential Geometry is the field researching the space (which is called a manifold) where can treat the continuity and the differentiabiliy of various geometric quanttities and researching the properties of the figures in the space which are invariant under some Lie group action (on the space). The topology is the field researching the space (which is called a topological space) where can treat only the continuity of various quantities and researching the properties of the figures in the space which are invariant under continuous deformations. The algebraic geometry is the field researching the properties of the figures given as the common zero-point set of some polynomials. The purpose of this division of research is to construct the comprehensive geometric theory of the natural science (in wide sense) of the quantum mechanics, the condense matter theory, molecular biology, the grain boundary structure theory and composite materials mechanics, and feedback to each of the above fields of the natural science. This division was started from April 1st in 2025 for the above purpose.
Professor Naoyuki Koike (Director of DGNS)
Research organisation
OrganisationThe division brings together six mathematical fields and four fields of the natural sciences. Hover a theme in the legend to highlight its links.
Research Themes
Four Groups
I. Condensed matter from the viewpoint of geometric analysis
Regarding clusters as weighted coloured directed graphs, we study their shapes in 3-space as critical points of energy functionals.
II. Quantum walks from the viewpoint of geometric gauge theory
Using the connection theory of principal bundles, we study quantum walks as solutions of discretised Schrodinger and Dirac equations.
III. DNA and RNA via knot theory, quantum field theory and geometric calculus of variations
We study circular DNA and RNA both topologically (link structure) and differential-geometrically (the shape of the helices).
IV. Grain boundaries from the viewpoint of geometric analysis, and applications
We study the control of grain boundaries and strength in polycrystals, aiming at applications to composite materials mechanics.
Upcoming
Schedule- Workshop "Submanifold Geometry, Lie Group Action and Its Applications to Theoretical Physics 2026"Osaka Metropolitan University, Sugimoto Campus, Building E, Room E408
- Workshop "Submanifold Geometry and Lie Group Action 2026"Morito Memorial Hall, Kagurazaka Campus, Tokyo University of Science
- Workshop "Knot Theory, Geometric Lie Group Theory and Its Applications 2026"Morito Memorial Hall, Kagurazaka Campus, Tokyo University of Science