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15
Math.TechQA.Club
2026-04-17 00:04:20
891
Views
Least-squares over the unit simplex
Published on
17 Apr 2026 - 0:04
#optimization
#convex-optimization
#least-squares
#constraints
#quadratic-programming
51
Views
Show $y^Ty-n^{-1}(\sum y_i)^2=y^T(I-n^{-1}1_n1_n^T)y=\sum(y_i-\bar y)^2$?
Published on
15 Apr 2026 - 14:49
#statistics
#least-squares
#linear-regression
174
Views
Find an exponential formula with two inputs and one output
Published on
14 Apr 2026 - 15:21
#interpolation
#least-squares
1.6k
Views
Fitting a circle to a point set with gradient descent algorithm
Published on
15 Apr 2026 - 0:50
#optimization
#circles
#regression
#least-squares
#gradient-descent
207
Views
Constrained Linear Regression, how to find Regression SS?
Published on
15 Apr 2026 - 3:20
#statistics
#regression
#least-squares
#sums-of-squares
#linear-regression
1.2k
Views
Least Squares with Quadratic (Positive Definite) Constraint
Published on
13 Apr 2026 - 16:11
#convex-optimization
#matlab
#least-squares
#constraints
#quadratic-programming
1k
Views
Sum of Residuals equal to Zero
Published on
09 Apr 2026 - 2:24
#regression
#least-squares
#sums-of-squares
#mean-square-error
#cross-sections
454
Views
Constrained least squares
Published on
16 Apr 2026 - 1:36
#optimization
#least-squares
#constraints
328
Views
Show $\mathrm{cov}(E_i,E_j)=\sigma^2p_{ij}$ where $E_i=Y_i-\bar y - \hat\beta(x_i-\bar x)$
Published on
15 Apr 2026 - 19:23
#statistics
#regression
#covariance
#least-squares
160
Views
Estimating $\beta_o$ and $\beta_1$ with Weighted Least Squares with Logit link
Published on
16 Apr 2026 - 19:59
#statistics
#regression
#estimation
#least-squares
128
Views
How many different rectangles of maximum horizontal side K can be formed in an N x N grid?
Published on
16 Apr 2026 - 5:10
#combinatorics
#permutations
#least-squares
#rectangles
57
Views
Find linear Least Squares with Quadratic Constraint
Published on
16 Apr 2026 - 15:58
#optimization
#least-squares
3.1k
Views
Why is minimizing least squares equivalent to finding the projection matrix $\hat{x}=A^Tb(A^TA)^{-1}$?
Published on
12 Apr 2026 - 7:03
#calculus
#linear-algebra
#vector-spaces
#regression
#least-squares
267
Views
Constrained matrix least squares with a set of quadratic form constraints
Published on
16 Apr 2026 - 20:44
#optimization
#least-squares
93
Views
Understanding last step of OLS estimator variance proof
Published on
15 May 2026 - 7:35
#linear-algebra
#proof-explanation
#least-squares
#variance
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