Newbetuts
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New posts in commutative-algebra
Looking for a special class of ideals such that If every ascending chain of ideals from this class stabilizes, then $R$ is a Noetherian ring.
algebraic-geometry
ring-theory
commutative-algebra
ideals
noetherian
Can every irreducible cubic be proved irreducible using the Eisenstein criterion?
algebraic-geometry
commutative-algebra
factoring
irreducible-polynomials
Prove that the given polynomial is irreducible in $\mathbb{Z}[X]$.
abstract-algebra
polynomials
commutative-algebra
irreducible-polynomials
Grade of a maximal prime ideal in a Noetherian UFD
commutative-algebra
noetherian
unique-factorization-domains
When is the pushforward / direct image of a reflexive sheaf locally free?
algebraic-geometry
commutative-algebra
sheaf-theory
vector-bundles
Why is the topology on $\operatorname{Proj} B$ induced from that on $\operatorname{Spec}(B)?$
algebraic-geometry
commutative-algebra
graded-rings
Is there an algebraic non-rational extension of the integers, whose set of prime elements contains the prime integers?
abstract-algebra
ring-theory
commutative-algebra
prime-numbers
Intuition for ideal quotient / colon ideal?
ring-theory
commutative-algebra
ideals
Minimal spectrum of a commutative ring
commutative-algebra
ring-theory
noncommutative-geometry
Multidimensional Hensel lifting
commutative-algebra
algebraic-number-theory
p-adic-number-theory
Does $IJ=IK\implies J=K$ always hold for integral domain and finitely generated nonzero ideal $I$?
abstract-algebra
ring-theory
commutative-algebra
integral-domain
diagonalizing a matrix over the $\ell$-adics
linear-algebra
commutative-algebra
modules
p-adic-number-theory
When does tensor product have a (exact) left adjoint?
commutative-algebra
category-theory
modules
homological-algebra
tensor-products
Quotient of a local ring at a point is a finite dimensional vector space
algebraic-geometry
commutative-algebra
The set of zero divisors is a prime ideal
commutative-algebra
ideals
Checking if given polynomials are units in $\mathbb{Z}_7[x]$ [duplicate]
abstract-algebra
polynomials
ring-theory
commutative-algebra
Milnor's exercise: for any manifold $M$, $\mathrm{Hom}(C^\infty(M,\mathbb{R}),\mathbb{R})\cong M$
differential-geometry
commutative-algebra
proof-explanation
manifolds
Counter Example for Going Down Theorem
algebraic-geometry
commutative-algebra
Coordinate ring of the unit circle is never a UFD?
abstract-algebra
commutative-algebra
algebraic-curves
unique-factorization-domains
Integral extensions: one prime lying over implies equal localization
commutative-algebra
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