Dirac equation in the algebra of physical space Dirac equation in the algebra of physical space The Dirac equation, as the relativistic equation that describes spin 1/2 particles in quantum mechanics, can be written in terms of the Algebra of physical space (APS), which is a case of a Clifford algebra or geometric algebra that is based on the use of paravectors. The Dirac equation in APS, including the electromagnetic interaction, reads Another form of the Dirac equation in terms of the Space time algebra was given earlier by David Hestenes. In general, the Dirac equation in the formalism of geometric algebra has the advantage of providing a
The Physical Impossibility of Death in the Mind of Someone Living The Physical Impossibility of Death in the Mind of Someone Living The Physical Impossibility of Death in the Mind of Someone Living is an artwork created in 1991 by Damien Hirst, an English artist and a leading member of the "Young British Artists" (or YBA). It consists of a tiger shark preserved in formaldehyde in a vitrine. It was originally commissioned in 1991 by Charles Saatchi, who sold it in 2004, to Steven A. Cohen for an undisclosed amount, widely reported to have been at least $8 million. However, the title of Don Thompson's book, "The $12 Million Stuffed Shark: