1m
comment Property of $\limsup$ in $\ell_1$
For large $n$, show that $w_n$ and $w$ are "nearly" disjoint.
6m
answered What is the rationale for the absent (+) in mixed fractions?
19m
comment k to 12 philippines
Perhaps try this site: matheducators.stackexchange.com
1d
comment Is there any slang word for somebody who doesn't show up for a date?
Hmm ... he often makes dates and does not show up ... he's a stand-up guy...
1d
comment Tough equation in my entry exam
I think we need the exact wording from the entrance exam. Are we sure it did not say: "Find all integer solutions" ... or "How many real solutions are there" ??
1d
comment The Name for $\mathbb{R}$, $\mathbb{C}$, $\mathbb{H}$ and $\mathbb{O}$ Exclusively Algebras?
That wikipedia page suggests you should say "normed division algebras with unity". Unless, of course, your definition of "algebra" includes "with unity" already.
2d
comment A trouble with the discrete product topology
It is true that the description you quote is not for "the open sets" but for a base for the open sets. Your set $B$ is a finite union of sets of type $A$.
Jul
18
awarded Nice Answer
Jul
18
comment Analytic enlargement of an analytic set
No, only $F_\sigma$-sets are projections of closed sets in the real plane. Logicians sometimes use $\mathbb N^{\mathbb N}$ and call it "the reals", and there it would work.
Jul
18
answered Rediscovery of lost mathematics
Jul
17
answered How is $\,\int(1/x)\,dx = \ln|x|\,$ true?
Jul
16
awarded Good Answer
Jul
16
comment Do we need the $f,g \geq 0$ condition for $\int f \ d\mu = \int g \ d\mu$?
If the two integrals are both undefined, should we say they are equal anyway?
Jul
14
awarded Nice Answer
Jul
11
answered How to create circles and or sections of a circle when the centre is inaccessible
Jul
11
answered Series Ratio Test Convergence
Jul
10
comment Is there an app that lets me use an iPhone as a mouse?
absolute positioning is very difficult using the sensors available in an iPhone interesting idea ... use GPS to get the position of the iPhone accurately enough to serve as a mouse... :)
Jul
9
comment Converting x number of petaFLOPS into a base 2 number
So, what definitions are you using.... one petaFLOPS is $10^{15}$ FLOPS? or $2^{50}$ FLOPS? (similar to the question of whether a kilobyte is $1000$ byes or $1024$ bytes.)
Jul
9
comment Did Vernor Vinge originate the euphemism "you-gotta-believe-me"?
Interesting. I took "turn of the century" to mean around 1900. (Since the book was written before 2000.) But the book is set after 2000, so it may mean around 2000. Maybe Rainbows End (note: no apostrophe) is the book that popularized the phrase...
Jul
6
comment Base change for $\sqrt{2}.$
$\theta_{11}$ is certainly irrational. There is a well-known (but still far from proved) conjecture that all algebraic irrationals are normal in all bases. So (of course) your number is transcendental. But your question (whether there is an easy proof of it) is not answered by this.
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