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New posts in linear-groups
How is $\mathrm{PGL}(V)$ a subgroup of $\mathrm{P\Gamma L}(V)$?
linear-algebra
abstract-algebra
group-theory
permutations
linear-groups
Techniques for showing that a subgroup is not normal
linear-algebra
abstract-algebra
matrices
group-theory
linear-groups
Why is the quotient map $SL_n(\mathbb{Z})$ to $SL_n(\mathbb{Z}/p\mathbb Z)$ is surjective?
abstract-algebra
group-theory
ring-theory
linear-groups
Elements of $GL_{2}(\mathbb{Z})$ of finite order
abstract-algebra
matrices
field-theory
linear-groups
$GL_n(\mathbb F_q)$ has an element of order $q^n-1$
linear-algebra
abstract-algebra
finite-fields
linear-groups
Finite-order elements of $\text{GL}_4(\mathbb{Q})$
abstract-algebra
group-theory
totient-function
cyclotomic-polynomials
linear-groups
Proving that matrices in $O(2)$ are of one of two forms
linear-algebra
orthogonality
orthonormal
linear-groups
Does SO(3) preserve the cross product?
linear-algebra
cross-product
orthogonal-matrices
linear-groups
Commutator Group of $GL_2(R)$ is $SL_2(R)$
group-theory
normal-subgroups
linear-groups
Finding the normalizer of $\left\{ \left(\begin{matrix} x &0 \\0 & y \end{matrix}\right) : x,y\in \mathbb R\setminus\{0\} \right\}$
abstract-algebra
matrices
group-theory
linear-groups
similar-matrices
Transpose inverse automorphism is not inner
abstract-algebra
group-theory
linear-groups
Nontrivial homogeneous Vector bundle
lie-groups
differential-topology
vector-bundles
homogeneous-spaces
linear-groups
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