# Recent history for Jia Yiyang

6
months
ago
 question answered Why isn't the renormalization of composite operators determined by the renormalization of elementary fields?
9
months
ago
 edited a comment If one wants to become a theoretical physicist working on the interface of quantum field theory and statistical mechanics, but he is not into particle physics, not much about superconductor, superfluid etc. What area or question would you suggest him to look into?
9
months
ago
 posted a comment If one wants to become a theoretical physicist working on the interface of quantum field theory and statistical mechanics, but he is not into particle physics, not much about superconductor, superfluid etc. What area or question would you suggest him to look into?
1
year
ago
 received upvote on question How to understand the success of perturbation theory in QFT, despite Haag's theorem?
1
year
ago
 question got unvoted How to understand the success of perturbation theory in QFT, despite Haag's theorem?
1
year
ago
 received upvote on question How to understand the success of perturbation theory in QFT, despite Haag's theorem?
1
year
ago
 received upvote on comment Why are the Yang-Mills instantons classified by the 3rd homotopy group of $S^3$?
1
year
ago
 received upvote on comment Theta-vacuum in the gauge field theory
1
year
ago
 edited a comment Theta-vacuum in the gauge field theory
1
year
ago
 posted a comment Theta-vacuum in the gauge field theory
1
year
ago
 question commented on When can we say we fully understand QCD?
1
year
ago
 question answered Errata of Weinberg's QFT textbooks, 2005 edition.
1
year
ago
 posted a comment Errata of Weinberg's QFT textbooks, 2005 edition.
1
year
ago
 question commented on Errata of Weinberg's QFT textbooks, 2005 edition.
1
year
ago
 received upvote on comment I need a start point
1
year
ago
 posted a comment I need a start point
2
years
ago
 posted a comment Assumptions on Goldstone theorem
2
years
ago
 posted a comment Where's the "red bullet" for anti-spam verification for registration?
2
years
ago
 question commented on Where's the "red bullet" for anti-spam verification for registration?
2
years
ago
 question commented on Where's the "red bullet" for anti-spam verification for registration?