Some years ago the author defined a pseudo inverse of a singular matrix and used it in representing a solution of normal equations and for obtaining variances and covariances of estimates in the ...

For any complex matrices A and W, m × n and n × m, respectively, it is proved that there exists a complex matrix X such that AXA = A, XAX = X, (AX)∗ = AX and XA(WA)k = (WA)k, where k is the index of ...

The COSAN statement constructs the symmetric matrix model for the covariance analysis mentioned earlier (see the section "The Generalized COSAN Model"): The number of rows of the first matrix in each ...

Scatter plots are displayed for pairs of variables. Without X variables, scatter plots are displayed as a symmetric matrix containing each pair of Y variables. With a nominal Y variable, scatter plots ...

CBSE Class 12 Mathematics Chapter 3 Matrices Revision Notes: With the 2024 board exams around the corner, the time to put down the books and begin revising the topics has come. Mathematics is a ...