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New posts in formal-power-series
Is the ring of formal power series in infinitely many variables a unique factorization domain?
abstract-algebra
ring-theory
unique-factorization-domains
formal-power-series
When does $f,g \in R[x]$ relatively prime imply $f,g \in R[[x]]$ relatively prime.
ring-theory
commutative-algebra
formal-power-series
An infinite family of Artin-Schreier polynomials which all split in $\mathbf{F}_q(\!(\theta)\!)$
extension-field
valuation-theory
formal-power-series
local-field
Prove addition law from duplication formula (for power series associated to elliptic genus)
algebraic-topology
commutative-algebra
elliptic-curves
characteristic-classes
formal-power-series
If $R[x]$ and $R[[x]]$ are isomorphic, then are they isomorphic to $R$ as well? [duplicate]
polynomials
ring-theory
commutative-algebra
examples-counterexamples
formal-power-series
The group of $k$-automorphisms of $k[[x,y]]$, $k$ is a field
abstract-algebra
group-theory
commutative-algebra
formal-power-series
If $R$ is a Noetherian ring then $R[[x]]$ is also Noetherian
abstract-algebra
ring-theory
commutative-algebra
noetherian
formal-power-series
A sequence of coefficients of $x+(x+(x+(x+(x+(x+\dots)^6)^5)^4)^3)^2$
combinatorics
generating-functions
integers
formal-power-series
oeis
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