Reputation
21,114
Top tag
Next privilege 25,000 Rep.
Access to site analytics
Badges
5 29 69
Impact
~112k people reached

17h
comment How do I tell if a differentiation and its antiderivative is unique?
Proof read your question. As it stands, it is at least inconsistent leaning to incoherent.
2d
revised Find $\int_0^{\infty} \frac{dx}{1+e^x}$
added 1 character in body
2d
revised Find $\int_0^{\infty} \frac{dx}{1+e^x}$
added 57 characters in body
2d
answered Find $\int_0^{\infty} \frac{dx}{1+e^x}$
Apr
27
comment Showing that $\sup\{|f(x)-f(y)|, x,y\in X\}= \sup \ f - \inf \ f$
small sign error
Apr
26
revised Does the regularity of $\omega_{\alpha+1}$ need Axiom of Choice?
edited title
Apr
24
revised derivative of differentiable function
added 33 characters in body
Apr
24
answered derivative of differentiable function
Apr
19
comment Why does the power series of $ x + x^2 + x^3 …$ not equal to $x/(1-x) $ when x is larger than 1?
Not "if" but "only if" ....
Apr
13
awarded  Popular Question
Apr
13
comment How to compute $\lim\limits_{x\to \frac{\pi}{2}}\frac{\sin(x)-1}{x-\frac{\pi}{2}}$ without using the L'Hôpital's rule?
Using the definition of derivative is logically prior to using L'Hopital's rule.
Apr
12
comment Calculate trigonometric integral: $\int \sin(x)[\sec(2x)]^{3/2}dx$
This is slightly unsatisfactory but works: the primitive of that function is $\cos x \cdot (\sec(2x))^{1/2} + C$. Differentiate it to recover your integrand and then use those algebraic steps to figure out how to derive the primitive 'without' knowing the answer.
Apr
4
comment What is the difference between $x+\sqrt{x^2}$ and $2x$?
$\sqrt{x^2} = |x| \neq x$ for all $x$, only non-negative $x$.
Apr
4
comment How to visualize topological differences between $\mathbb{R}P^{2n}$ and $\mathbb{C}P^n$
+1 Great answer
Mar
29
revised Sketch $\dot x =x-y$, $\dot y= x+y$ on a phase portrait.
deleted 16 characters in body
Mar
28
answered Divergence of the sequence $n^2-100n$ as $n$ goes to $\infty$.
Mar
27
comment What made the proof of the four color theorem on planes so hard?
Bravo...........
Mar
25
awarded  Nice Question
Mar
2
comment Correct set notation for “all integers which are not multiples of 7”?
Yes but to my eyes at least this is the clearest answer as it uses the least technical notation.
Feb
22
comment Differential Equation with biology!
@Did Fair enough. Done