Published here in the original German and French, along with an English translation, the correspondence between Albert Einstein and Elie Cartan includes letters written between 1929 and 1932, after which time Einstein abandoned his unified field theory based on absolute parallelism.
Hugh Aitken describes a critical period in the history of radio, when continuous wave technology first made reliable long-distance wireless communication possible and opened up opportunities for broadcasting voice and music.
Barry Simon's book both summarizes and introduces the remarkable progress in constructive quantum field theory that can be attributed directly to the exploitation of Euclidean methods.
SSQG SCALER SONIC QUANTUM GEOMETRY AND THE UNIFIED PHYSICS OF FREQUENCY UNVEILS A REVOLUTIONARY FRAMEWORK THAT SHATTERS CONVENTIONAL UNDERSTANDING, UNIFYING THE FUNDAMENTAL FORCES OF PHYSICS WITH THE PRIMORDIAL POWER OF FREQUENCY.