Quantum-Relativity, (qr).
Within classical mechanics, we could get away with our rotationally-frigid number-theory, but include relativity and we could no longer get away with it. From the death of Maxwell in 1879, physicists have simply continued to employ the pre-Gaussian "flat-earth-arithmetic".
Bohr was arguably the greatest and bravest scientist of all time. But, by what strange mind-blindness could such a truly brilliant character leave the important subject of Relativity to an outside imposter who did not even believe in quantum physics at all and who was quite rightly blocked from teaching simple high-school math's and science on account of his Polytechnic's examined (and noted to potential high-school employers) lack of mathematical competence?
Did Einstein's polytechnic not teach the Gaussian school applied mathematics required to analyse the dynamics of electromagnetic fields? I am sure that they did, but Einstein must have always skipped those classes to debate the meaning of life, music and art with his intellectual friends in the smart cafes of Zurich. It is no wonder that the electrical engineers at the Swiss Patents Office thought of Einstein as a very pleasant colleague indeed, but "as thick as two planks".