Spectrum of $\mathbb R[X,Y]$
21946
What do prime ideals in $k[x,y]$ look like?
52596
A basis for $k(X)$ regarded as a vector space over $k$
115270
What are the generators of $(\mathbb{R},+)$?
78075
Why can I apply $HS^\dagger$ and then measure in the computational basis to measure $Y$?
100731
Positive operator has a positive spectrum?
73254
spectral radius in normed space is subadditive.
24561
$\mathbb S_n$ as semidirect product
114987
How many connected components does $\mathrm{GL}_n(\mathbb R)$ have?
86622
I want to find an example where the Spectrum is equal to the Continuous Spectrum in C[0,1]; $\sigma_c(A)=\sigma(A)$
35777
$\mathbb{R}[X,Y]/(Y-X^2,Y+X)\cong_\text{Ring} \mathbb{R}\times \mathbb{R}$
55488
Proving that $\operatorname{codim}(X,Y)=\dim(\mathcal{O}_{X,\eta})$
116768
Problem 5, sec. 13 in Munkres' Topology, 2nd ed.: How to prove the assertion if $\mathscr{A}$ is a subbasis?
106097
Spectrum of the sum of two commuting matrices
66866
Algebraic dual of $\mathbb{R}^{\mathbb{N}}$
33944
Describe $\mathbb{R}[x]/(x^{2}+ax+b)$ where $a,b \in \mathbb{R}$
128711
$(\Bbb Z\oplus \Bbb Z)[X] \not\cong \Bbb Z[X]\oplus \Bbb Z[X]\,$?
61375
Meaning of $\mathbb{R}[x]$