Autocovariance function at lag k for the process $x_t=A\cos(wt)+B\sin(wt)$
64621
Calculate mean and autocovariance function to check stationarity
9356
Derivation of the formula for Ordinary Least Squares Linear Regression
48811
Characteristic function of product of normal random variables
101213
General distributional solution of the Airy Equation
116270
Functional equations leading to sine and cosine
37283
Show that $\frac{X-\mu}{\sigma}\sim N(0,1)$ using moment functions
109853
Laplace transform of $\cos(at)$
132472
VAR/VECM/ARDL optimal lag selection
61051
Covariance term in simple linear regression
37856
Covariance between sum of iid random variables and sum of indicator functions
129598
Linear transformation of random variables
104847
Minimum covariance of 2 random variables given the covariance of each with a third random variable
16713
Product of an exponential function of IDD variables
10376
Compute the moment generating function of $Y = X_1X_2 + X_1X_3 + X_2X_3$
33785
Proof that the coefficients in an OLS model follow a t-distribution with (n-k) degrees of freedom
70880
Invariance of canonical Hamiltonian equation when adding the total time derivative of a function of $q_i$ and $t$ to the Lagrangian
74041
Derivation of polytropic process equation