Dirac was also noted for his personal modesty. He called the equation for the time evolution of a quantum-mechanical operator, which he was the first to write down, the "Heisenberg equation of motion". Most physicists speak of Fermi–Dirac statistics for half-integer-spin particles and Bose–Einstein statistics for integer-spin particles. While lecturing later in life, Dirac always insisted on calling the former "Fermi statistics". He referred to the latter as "Bose statistics" for reasons, he explained, of "symmetry".
dirac was also noted for his personal modesty he called the equation for the time evolution of a quantum-mechanical operator which he was the first to write down the "heisenberg equation of motion" most physicists speak of fermi–dirac statistics for half-integer-spin particles and bose–einstein statistics for integer-spin particles while lecturing later in life dirac always insisted on calling the former "fermi statistics" he referred to the latter as "bose statistics" for reasons he explained of "symmetry"