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New posts in abstract-algebra
Finding a Galois extension of $\Bbb Q$ of degree $3$
abstract-algebra
field-theory
galois-theory
extension-field
Automorphism on integers
abstract-algebra
group-theory
What is the minimal number of generators of the ideal $(6x, 10x^2, 15x^3)$ in $\Bbb Z[x]$?
abstract-algebra
ring-theory
ideals
definition of a groupoid
abstract-algebra
algebraic-topology
category-theory
groupoids
Why adjoining non-Archimedean element doesn't work as calculus foundation?
calculus
abstract-algebra
nonstandard-analysis
$AB \neq 0$ but $BA=0$
abstract-algebra
matrices
noncommutative-algebra
Is it possible to learn ring theory if one's familiar, but not good at group theory? [closed]
abstract-algebra
group-theory
ring-theory
advice
In a ring, how do we prove that a * 0 = 0?
abstract-algebra
ring-theory
rngs
Basic exercise on localization of modules
abstract-algebra
commutative-algebra
modules
Show $Gal(E/\mathbb{Q})\cong \mathbb{\mathbb{Z_2\times Z_2}}$
abstract-algebra
galois-theory
extension-field
Is it true that an element of a group whose order divides the order a subgroup is an element of the subgroup
abstract-algebra
group-theory
Intuition regarding Chevalley-Warning Theorem
abstract-algebra
polynomials
algebraic-number-theory
intuition
finite-fields
Definitions of direct product and of direct sum
abstract-algebra
category-theory
definition
Relationship between algebraically closed fields and complete metric spaces?
abstract-algebra
general-topology
Do we gain anything interesting if the stabilizer subgroup of a point is normal?
abstract-algebra
group-theory
group-actions
why is a nullary operation a special element, usually 0 or 1?
abstract-algebra
universal-algebra
why $χ$ is linear combination of identity representation and regular representation with integer coefficients?
abstract-algebra
group-theory
representation-theory
characters
Injectivity of $I\leadsto V_I(-)$ and relation to Hilbert's Nullstellensatz
abstract-algebra
algebraic-geometry
commutative-algebra
Commutative rings without assuming identity
abstract-algebra
ring-theory
commutative-algebra
rngs
Should a ring be closed under multiplication?
abstract-algebra
ring-theory
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