ifferential operators on metric graphs appear naturally in numerous applications where one is interested in describing transport or propagation of waves on a metric graph—a set of edges (bonds) joined at their end-points forming vertices (summits). Such problems became popular in the last two decades and are known nowadays as quantum graphs, despite that it is n…
Bridging the gap between the world of science and the realm of the spiritual, B. Alan Wallace introduces a natural theory of human consciousness that has its roots in contemporary physics and Buddhism. Wallace's "special theory of ontological relativity" suggests that mental phenomena are conditioned by the brain, but do not emerge from it. Rather, the entire natural world of mind and matter, s…
By the century's end, discrepancies in the idea of an all-pervading ether began to appear. It was expected that light would travel at a fixed speed through the ether but that if you were traveling through the ether in the same direction as the light, its speed would appear lower, and if you were traveling in the opposite direction of the light, its speed would appear higher. Yet a series of exp…