In the early days of the

Dirac equation, interpretations have evolved from a proposed theory of electrons and protons to that of electrons and positrons with positrons as "holes" in an infinitely full electron "sea" to that of electrons with positrons as electrons moving "backwards in time.

Users can measure the speech intelligibility of a sound reinforcement system using an excitation signal, played directly from

DIRAC, through the sound device output or from an external device such as a CD or MP3 player.

Another remarkably glaring issue is that

Dirac already claimed to have unified general relativity and quantum theory years ago, yet everyone in physics has ignored it.

n](x)} is a regular sequence of infinitely differentiable functions converging to the

Dirac delta-function [delta](x).

In the past, I have read many books concerning the development of quantum theory, both technical and historical, and though I have read much concerning Bohr, Einstein, Heisenberg, Pauli, and others, and even personal reflections by them, rarely is there even a glimpse into the personal life of Paul Adrien Maurice

Dirac.

In the case of

Dirac bispinor (1/2,0) [direct sum] (0,1/2) C is charge conjugation operator.

Dirac introduced, in the quantum mechanics, the delta "function" ([delta]), which is over all null, with the exception of a point (in origin taking1 value), defined as follows:

Penrose reminds us that

Dirac himself used the 2-spinor holomorphic functions, while many recent papers overlook them.

Nevertheless, Einstein's initial insights, built upon the work of earlier scientists (notably Lorentz and Poincare), are taken as the beginning of modern cosmology, for, eleven years after the publication of his initial papers, his special theory of relativity would lead to the full formulation of his general theory of relativity, and his initial insights into the nature of matter and radiation--built especially upon the work of Max Planck, who asserted in 1900 that energy of radiation is produced in discrete little bundles, in direct proportion to the radiation's frequency (the famous E=hv equation)--would lead Bohr, Heisenberg, Schrodinger,

Dirac, and Fynmann to work out the Quantum Theory, which in turn would change our perception of the physical world.

VLADIMIR ZAKHAROV--a prominent mathematician, winner of the prestigious

Dirac Prize--recently published his third volume of poetry, entitled Pered nebom (Before heaven).

The team explains how electric charges in graphene appear to behave like relativistic particles (called massless

Dirac fermions) with zero rest mass, and are described by Einstein's relativity theory (the so-called

Dirac equation).

5%)-level, making a sensitive test of the

Dirac structure of the weak currents possible.