  Commutation or anticommutation relations quantized at equal instant time and
commutation or anticommutation relations quantized at equal light-front time
cannot be transformed into each other. While they would thus appear to describe
different theories, we show that this is not in fact the case. In instant-time
quantization unequal instant-time commutation or anticommutation relations for
free scalar, fermion, or gauge boson fields are c-numbers. We show that when
these unequal instant-time commutation or anticommutation relations are
evaluated at equal light-front time they are identical to the equal light-front
time commutation or anticommutation relations. Light-front quantization and
instant-time quantization are thus the same and thus describe the same physics.
