Cardinality of set of all orthogonal matrices over $\Bbb Z$
13442
Find three real orthogonal matrices of order $3$ having all integer entries.
87451
Construction of matrices under ZFC axioms
137081
Is the set of real matrices diagonalizable in $\mathcal M_n(C)$ dense in the set of all companion matrices?
132366
Diagonalizability of $A \in M_{n}(\Bbb{R})$ (Upper traingular matrix) with all diagonal entries 1 and $A \neq I$?
108505
Matrix Concentration for Products- Orthogonality Property
7938
Number of Homomorphisms from $\Bbb{Z}_m$ to $\Bbb{Z}_n$
39430
Orthogonal matrix and orthonormal columns
85681
Cardinality of polynomials with real coefficients
127233
Cardinality of order types in $\mathbb{N}$
36064
How many $3 \times 3$ integer matrices are orthogonal?
12436
The cardinality of the set of all finite subsets of an infinite set
77799
Determine the set of units $(\Bbb Z/n\Bbb Z)^\times$ for different values of $n$
144735
Possible cardinality of power sets
12955
Classification of $n\times n$ real matrices up to congruence
8627
Number of equivalence classes of $w \times h$ matrices under switching rows and columns
25335
Orthogonal matrix over cross product
63465
Orthogonal Projection of $ z $ onto the Affine set $ \left\{ x \mid A x = b \right\} $