Topological groups, which integrate algebraic group structures with continuous topologies, and metric spaces, defined by a distance function, form a fundamental basis for modern mathematical analysis.

Fig. 1 An internationally collaborated group, led by Ikerbasque Professor Konstantin Bliokh (upper-right) in DIPC Spain, Nanyang Assistant Professor Yijie Shen (mid-right) in NTU Singapore, and ...

Light that twists as it travels and materials whose internal order is knotted like a pretzel are starting to collide in the ...