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2d
revised Relation between bounded derivative and limit of a function
added 284 characters in body
2d
answered Relation between bounded derivative and limit of a function
2d
comment How to rigorously establish this limit of sums
Is there some kind of relationship between $g_n$ and $g$?
Jul
29
comment If $gcd(a,b)=1$, then there exists integers x and y such that $xa + yb = 1$
This is a particular case of Bézout's identity which you can read here en.wikipedia.org/wiki/B%C3%A9zout%27s_identity
Jul
27
answered Line integrals in differential form
Jul
26
revised Power serie of $f'/f$
deleted 7 characters in body
Jul
26
answered What is the homeomorphism between a disk and an ellipse?
Jul
26
answered Power serie of $f'/f$
Jul
24
comment Prove that $f'(0)=L$.
@columbus8myhw It looks like your $f$ is discontinuous.
Jul
23
comment How to evaluate this partial derivative?
@HenningMakholm You are right on the first thing, not on the second because the $xy(x^2-y^2)\partial_y(x^2+y^2)=2y\cdot xy(x^2-y^2)=2xy^2(x^2-y^2)$.
Jul
23
revised How to evaluate this partial derivative?
deleted 55 characters in body
Jul
23
answered How to evaluate this partial derivative?
Jul
23
comment Solve $a^x+b^x=c$ for $x$
Please let me know when you find a closed form.
Jul
23
revised Point of intersection of $f(x)=\sin(2x)+\cos(2x)$ and the $x$-axis
added 38 characters in body
Jul
23
answered Point of intersection of $f(x)=\sin(2x)+\cos(2x)$ and the $x$-axis
Jul
22
answered How to integrate $\int \frac{\arctan x}{x^4} dx$?
Jul
22
revised Use the graph of f to find the limit
[Edit removed during grace period]
Jul
22
revised Calculating values of $1 - \cos(x)$ for $x$ near zero using computer arithmetic
deleted 12 characters in body; edited title
Jul
22
answered Use the graph of f to find the limit
Jul
22
revised Use the graph of f to find the limit
added 37 characters in body