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 Yearling
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~6k people reached

Apr
26
comment Can I represent groups geometrically?
Is there some group which cant be represented in this way?
Apr
14
revised Haar's theorem for the rotation-invariant distribution on the sphere
added 96 characters in body
Apr
13
answered Haar's theorem for the rotation-invariant distribution on the sphere
Mar
6
accepted dimension of space of modular functions using the Riemann-Roch theorem?
Mar
5
asked dimension of space of modular functions using the Riemann-Roch theorem?
Feb
25
asked Connected subgroup of a topological group.
Feb
24
comment $F$ be a field of non-zero prime characteristic $p$ , is it true that there is only one group homomorphism $f:(F,+) \to (F$ \ $\{0\},.)$?
The field is of characteristic $p$, not order $p$. The field may not even be finite.
Feb
9
accepted Is $\mathbb{R}$ an algebraic extension of some proper subfield?
Feb
9
comment Is $\mathbb{R}$ an algebraic extension of some proper subfield?
Why is $\mathbb{Q}(B)$ a proper subfield of $\mathbb{R}$?
Feb
9
comment Is $\mathbb{R}$ an algebraic extension of some proper subfield?
sorry, meant $K$
Feb
9
revised Is $\mathbb{R}$ an algebraic extension of some proper subfield?
changed notation from F to K
Feb
9
asked Is $\mathbb{R}$ an algebraic extension of some proper subfield?
Jan
11
awarded  Yearling
Nov
15
comment show that $f(z)+f(z^2)+\cdots + f(z^n)+\cdots$ converges locally uniformly to an analytic function in the unit disk.
Use Morera's theorem and the fact that local uniform convergence lets you interchange the limit and the integral on a closed contour.
Nov
13
comment Weak Convergence and Weak Topology
however, note that the converse is not true: if $x$ is in the weak-closure of $A$, then it is not true that there is a sequence $x_n \in A$ which converges to $x$ weakly.
Nov
13
suggested rejected edit on Unique representations of positive integers?
Nov
13
comment Unique representations of positive integers?
first of all, you need to clarify what you mean by a "representation".
Nov
13
comment Show that $a^m$ is in $H$ for every $a$ in $G$
If a group $G$ has order $n$, and $a \in G$, then what can you say about $a^n$?
Nov
8
comment spectrum of compact operators
it does not depend on pairwise distinct eigenvalues. Any eigenvalue will have only finite multiplicity (the dimension of its eigenspace is finite. ) Hence, any limit point of the sequence $\phi(k)$ will be a limit point of the spectrum of $M_\phi$.
Nov
8
answered spectrum of compact operators