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| bio | website | math.stackexchange.com/users/… |
|---|---|---|
| location | Antarctica | |
| age | 77 | |
| visits | member for | 7 months |
| seen | yesterday | |
| stats | profile views | 149 |
Self-learning mathematics. Many thanks to those who make time to help others on the site.
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May 17 |
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Are there any series whose convergence is unknown? Out of curiosity, what makes this a "joke" answer? |
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May 14 |
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Finding asymptotes of exponential function and one-sided limit @Mhenni Why are the first two terms of the taylor series expansion enough to find the asymptote? Certainly there are functions where the first two terms wouldn't suffice to give an accurate approximation. |
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May 14 |
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What are the limits and asymptotes of $f(x)=x+\frac{1}{x}$? @Garmen1778 I'm not sure if you were implying that there was a horizontal asymptote or not, but in case there's any ambiguity, there are no horizontal asymptotes. |
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May 12 |
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Using $\gcd(a,b)$ to find gcd of other values $\gcd(a^2,b)$ and $\gcd(a^3,b)$ Why is $b = p^{50}m$? |
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May 3 |
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Is there something faulty about this statement? Yeah, but when they used $k$ in both, it reads that the $k$'s are going to be the same. Is this sort of thing standard notation? |
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May 3 |
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Trig and algebra problem: Finding sides of a triangle by expanding the whole thing on the RHS? |
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May 3 |
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Trig and algebra problem: Finding sides of a triangle I was able to get that, but I don't know what to do with it |
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May 2 |
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Rudin or Apostol @BrianM.Scott When you say Apostol covers more material, do you mean that he's just more explicit in his explanations or he covers all the topics and theorems that Rudin does, plus more? |
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Apr 26 |
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Show that there is no rational number $r=m/n$ such that $r^3=3$ @EricNaslund Do you mean as long as $n\geq 2$ is an integer? |
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Apr 25 |
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Show that there is no rational number $r=m/n$ such that $r^3=3$ @ThomasAndrews Does it make a difference that this is cubed root? |
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Apr 25 |
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Proving a complex equality So for the trivial case, you can't use the quotient you've set $z$ equal to? |
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Apr 23 |
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Proving a complex equality I'm aware of that answer, but I'm looking for an algebraic answer simply because that wouldn't come to me immediately. How did you see that it was an ellipse? I ask because it's not in the familiar form that you see in conic sections of calculus. |
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Apr 13 |
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Finding a closed form expression for this sum How do you know that the 2nd term is equal to $(1/\sqrt{1-4x})^2$? |
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Apr 13 |
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Finding a closed form expression for this sum @MarcvanLeeuwen How did you search for that? I didn't know how to search for it because there's no specific name or term associated with it. O.w. I'd just have to look through all the results one at a time. |
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Apr 11 |
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Solving functional equation for generating function But doesn't that change the value of the sum? |
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Apr 11 |
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Solving functional equation for generating function Yeah, I've been trying to figure out how to get the indices to start at $0$ all day. Why is it you can just start the the indices (in your hint) at $0$? |
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Apr 11 |
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Simplifying Catalan number recurrence relation @BrianM.Scott In the first half of your answer, how do you go from $1+x\sum_{n\ge 0}\sum_{k=0}^nC_kC_{n-k}x^n$ to $1+x\left(\sum_{n\ge 0}C_nx^n\right)^2$ |
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Apr 10 |
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Finding functional equation for generating function yeah, it's not a big deal. :) I was just sort of stating it as an fyi. |
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Apr 10 |
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Finding functional equation for generating function your solution doesn't match the solution in the text :[ |
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Apr 9 |
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Functional equations and generating functions oh wow...Thanks for that. |
