The standard interpretation of a null state, or empty state, posits it as devoid of structure. This paper introduces a ...

Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Physicists show knotted cosmic strings may have dominated the early universe before collapsing to create matter—a theory ...

In the late 19th century, Georg Cantor believed his new theory could help the Church understand the infinite nature of the ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

An understanding of the complex social, political, economic and institutional factors that influence public policy is vital to effectively analyse policy decisions and social interventions, and to ...