Obtaining the $j$th component of the OLS - an explanation
1980
Question on how to normalize regression coefficient
93123
Systems of linear equations to calculate $\alpha$ and $\beta$
77587
Cross product: matrix transformation identity
111725
On the absolute value of Jacobian determinant - variable transformation in multi-integral
152646
OLS versus IV regression results
61038
Understanding the Details of the Construction of the Tensor Product
63118
Finding the closed form of the determinant of the Hilbert matrix
8970
Proving the cross product matrix tranformation identity with an alternative solution
79504
Analytical solution of a simple regression with fixed intercept
22781
Understanding and interpreting consistency of OLS
42301
Estimator for $\theta$ using the method of moments
42427
Understanding linear algebra in Ordinary Least Squares derivation
52857
Behaviour of $\frac{x^{3} y}{x^{6} + y^{2}}$ around origin
16644
Why does cancellation of dots $\frac{\partial \dot{\mathbf{r}}_i}{\partial \dot{q}_j} = \frac{\partial \mathbf{r}_i}{\partial q_j}$ work?
29583
Characterization of the trace function
42874
Identifying joint distribution
31116
Matrix given by $a_{ij} = 1/(i+j)$ is non-singular.