In August 2012 Shinichi Mochizuki posted his four preprints which develop a new inter-universal Teichmüller theory, with an alleged application to the proof of several famous conjectures including the "abc" conjecture.
Shinichi Mochizuki posted his four preprints. This was with an alleged application to the proof of several famous conjectures including the "abc" conjecture. This was in August 2012. These four preprints develop a new inter-universal Teichmüller theory.