Characterize units in formal power series $R[[x]]$
13162
Prove $\alpha \in R[[x]]$ is a unit iff $a_0 \in R$ is a unit
118436
Identifying the series $\sum\limits_{k=-\infty}^{\infty} 2^k x^{2^k}$
145886
Power series representation/calculation
73344
Definition of irreducible polynomial via the units of an integral domain.
20613
Units (invertibles) of polynomial rings over a field
77799
Determine the set of units $(\Bbb Z/n\Bbb Z)^\times$ for different values of $n$
66610
Finding a correspondence between $\{0,1\}^A$ and $\mathcal P(A)$
147920
Infinite powering by $i$
127029
Ring of formal power series finitely generated as algebra?
63829
Use Cauchy product to find a power series represenitation of $1 \over {(1-x)^3}$
144539
Power series $ f(g(z)) = z $
138279
Multiplicative order and powers
148550
Units in quotient ring of $\mathbb Z[X]$
120981
$(x-x_0)^0$ in power series
14830
A transformation of F[x]
87830
Relating the union of the power set of a set to the set itself
107842
Behaviour of ($\overline{a}_n)_{n=1}^{\infty}$ and ($\underline{a}_n)_{n=1}^{\infty}$