【Read between lines】Hal Tasaki "Physics and Mathematics of Quantum Many-Body Systems" p. 501 (Problem 3.4.a: Evaluation of a commutator of finite-range interactions)
【Read between lines】Peskin, Schroeder "An Introduction to Quantum Field Theory" p. 39 (The commutation relations of the generators of Lorentz group with Penrose's graphical notation)
【Read between lines】Hal Tasaki "Physics and mathematics of quantum many body systems" p. 44 (proof of Marshal-Lieb-Mattis theorem generalized to antiferromagnetic Heisenberg model with anisotropy)
【Read between lines】Hal Tasaki "Physics and mathematics of quantum many body systems" p. 496 (Problem 2.4.a: uniqueness in each M sector of ferromagnetic ground state via Perron-Frobenius theorem)
【Read between lines】Peskin, Schroeder "An Introduction to Quantum Field Theory" p. 301 (derivative of determinant in Penrose graphical notation for Gaussian integral of Grassmann numbers)
