Singular matrix with entries in a ring.
74441
Zero divisors in matrix rings
107900
A ring which has many distinct left inverses
58595
Existence of a G-invariant matrix
86150
Geometric interpretation of matrices
10908
Associated elements in a ring
149629
The Eigenvalues of a block matrix
86875
Finding the null space of symmetric matrix generated by outer product
157899
Matrix problem similar to Problem 3, SEEMOUS 2019
32064
Zero-dimensional matrices
11573
Rings and some of their properties
69542
Why do the $n \times n$ non-singular matrices form an "open" set?
149916
Minimum eigenvalue and singular value of a square matrix
57027
Determinant of this skew symmetric matrix
105913
Calculations in quotient rings
35247
The characteristic and minimal polynomial of a companion matrix
1865
Sub-determinants of an orthogonal matrix
80616
A ring with few invertible elements