Skip to main content
Moya's user avatar
Moya's user avatar
Moya's user avatar
Moya
  • Member for 9 years, 5 months
  • Last seen this week
  • New York City
23 votes
Accepted

Essentially bounded function on $\mathbb{R}$

17 votes
Accepted

Locally Euclidean Hausdorff topological space is topological manifold iff $\sigma$-compact.

15 votes
Accepted

Why is [a, b] not in basis for order topology?

12 votes
Accepted

Schwartz functions have finite $L^p$ norm

11 votes
Accepted

Motivation for the Definition of Compact Space

10 votes

$A \cup B$ and $A \cap B$ connected $\implies A$ and $B$ are connected

9 votes
Accepted

What is the best calculus book for my case?

7 votes
Accepted

Characterization of 1-dimensional manifolds.

7 votes
Accepted

GRE Question ($|x|$ vs $\sqrt{x^2}$)

7 votes
Accepted

If $\sup_n\int_E f_n(x)\ \mathsf dx\leq M\mu(E)$ then the measure of $\{x\in [0,\infty)\mid f(x)>M\}=0$.

7 votes

Sufficient conditions for the Hardy-Littlewood Maximal function $M(f)$ being continuous

6 votes
Accepted

Finding the value of $f(x)\times f(-x)$

6 votes
Accepted

If $f$ is Lebesgue integrable on $ R$ then $\lim_{h\to 0} \int_R |f(x+h)-f(x)|dx=0? $

6 votes

Is $i^i$ mathematically valid?

6 votes
Accepted

Sequences of functions that converge uniformly, or pointwise, but not in $L^1.$

6 votes

Prove $\gcd(n, n + 1) = 1$ for any $n$

6 votes
Accepted

Let H be a subgroup of a group G. H is normal iff aH=Ha for every a $\in$ G

6 votes
Accepted

Can I skip computational advanced calculus and work on Spivak's 'Calculus on Manifolds'?

5 votes

Geometric Interpretation of the Basel Problem?

5 votes

Question about matrix exponential

5 votes
Accepted

Lie bracket $[x,x]=0\implies [x,y]=-[y,x]$

5 votes
Accepted

Fundamental definition of trigonometric functions

4 votes

Am I getting the right answer for the integral $I_n= \int_0^1 \frac{x^n}{\sqrt {x^3+1}}\, dx$?

4 votes
Accepted

Need help with understanding the Basis for a Topology

4 votes
Accepted

How do geometers define "locally looks like" in differential geometry?

4 votes

Prove two bases are not equivalent on $C[0,1]$

4 votes

What is an Isomorphism: Linear algebra

4 votes
Accepted

Show a function is Lebesgue integrable

4 votes

What $+1+1+\cdots$ really equals

4 votes
Accepted

Show that the open disk $D(a,r)$ is connected.

1
2 3 4 5