Derivation of the Kubo formula in Ashcroft & Mermin
90930
Derivation of Kubo Formula for Hall Conductance
73230
Roots of the incomplete gamma function
14203
Finding the creation/annihilation operators
136849
Mathematical rigorous introduction to solid state physics
122127
An "AGM-GAM" inequality
134314
Good reading on the Keldysh formalism
27812
Understanding the differential $dx$ when doing $u$-substitution
140375
$k$-space tensor integral in statistical physics
114021
Inverse Green's Function identity in derivation of Hedin's equations
25164
Velocity-Dependent Potential and Helmholtz Identities
9356
Derivation of the formula for Ordinary Least Squares Linear Regression
129170
Deriving the expectation of $[\hat X,\hat H]$
36152
Bessel function representation of spacelike KG propagator
25433
Derivation of the general forms of partial fractions
94173
Deriving the Lagrangian for a free particle
152696
Proof of LOOCV formula
45317
Asymptotic behaviour of a multiple integral on the unit hypercube