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Mathematics
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David Holden's user avatar
David Holden's user avatar
David Holden
  • Member for 11 years, 2 months
  • Last seen more than 3 years ago
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17
Must a ring (commutative, with 1), in which every non-zero ideal is prime, be a field?
Aug 8, 2019
15
How do I show this $\cos^2(\arctan(x))=\frac{1}{1+x^2}$
Aug 16, 2016
13
Evaluate the limit $\lim\limits_{n \to \infty} \frac{1}{1+n^2} +\frac{2}{2+n^2}+ \ldots +\frac{n}{n+n^2}$
Dec 24, 2013
13
Proof that $n/(n^2+1)$ tends to 0 as $n$ tends to infinity
Dec 2, 2013
13
Linear independence of $\sqrt{2}$, $\sqrt[3]{2}$, $\sqrt[4]{2}, \dots$ over the rationals
Feb 16, 2015
12
How can I find all the subfields of Q?
Sep 29, 2015
10
Why does the p-adic norm use base p?
Dec 20, 2019
10
Inequality $\arctan x ≥ x-x^3/3$
Jan 12, 2015
9
Query regarding Theorem 1.21 in Baby Rudin
Nov 13, 2014
9
convergence of the iterated cosine [duplicate]
Dec 30, 2013
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11
Which equation is Ebbinghaus's forgetting curve and what do the constants represent?
9
When was it first realized that sound travels with finite speed?
8
Is it easy in languages other than English to read a paragraph where all but the first and last letters of every word have been rearranged?
7
Did classical physicists feel ill-at-ease about point charges?
5
how understand periodicity in a combination of power, gamma and zeta functions?