About the Journal
PROGRESS OF THEORETICAL PHYSICS (PTP) was a monthly journal which contained academic research papers on theoretical physics. It was founded by Hideki YUKAWA in 1946. This journal published mainly the submitted and refereed original papers in all fields of theoretical physics such as particle physics, field theory, nuclear physics, condensed matter physics, statistical physics, astrophysics and cosmology. Each issue contained Papers and Letters, and, sometimes, Invited Papers on theoretical and experimental physics. PTP terminated in December 2012 and merged into PTEP in January 2013.