Mathematical and Molecular Topology - Hardcoverby Lorentz Jntschi (Guest Editor), Mihaela Tomescu (Guest Editor) This Special Issue, "Mathematical and Molecular Topology", is open for submissions and welcomes papers from a broad interdisciplinary area, since topology is concerned with the properties of objects that are preserved under continuous deformations, such as stretching, twisting, crumpling and bending. One of the oldest problems in topology is The Seven Bridges of Knigsberg. Topology