Explore an advanced mathematical lecture extending the classification of 4-dimensional Hamiltonian S1-spaces to almost complex manifolds. Delve into complex geometry and symplectic topology as speaker Donghoon Jang from Pusan National University presents cutting-edge research in this 47-minute talk. Gain insights into the intersection of Hamiltonian geometry and almost complex structures, expanding upon existing classifications in four-dimensional spaces. Suitable for graduate students and researchers in differential geometry, symplectic geometry, and related fields.