My research interests include: 

differential geometry, geometric topology, geometric invariants, low-dimensional geometry.

• D. Lee, Complex-valued extension of mean curvature for surfaces in Riemann-Cartan geometry, J. Geom. Phys. (accepted on 2025. 12. 23., arXiv:2502.12647).

• D. Lee, The renormalization of volume and Chern-Simons invariant for hyperbolic 3-manifolds, preprint (submitted, arXiv:2310.04776).

• D. Lee, The Inverse Mean Curvature Flow with Small Perturbation and the Riemannian Penrose Inequaltiy, Thesis for Bachelor's degree at GIST.