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???


2d
comment lim inf and lim sup convergence/divergence
Are these supposed to be sequence of positive numbers? If not, then the second one seems to be false.
Nov
19
answered f(1/n)=1, f(x)=0 for other x. prove the integral is 0 on [0,1]
Nov
14
comment the answer for thomsons lamp?
$\frac{1}{2}{}{}$
Nov
13
comment Is there anyone who could help me with this problems?
You should not have helped this person.
Nov
13
answered Proving an entire, complex function with below bounded modulus is constant.
Nov
10
comment Show $F_n$ has a least element and it is prime.
? This follows directly from the prime factorization.
Nov
6
comment Determine for which constants $a$, $b$, $c$ and $d$ it is true that $f \circ g = g \circ f$.
What have you tried?
Oct
31
answered Does “identical eigenvalues” mean that there is no diagonal matrix?
Oct
30
comment What is the word for the numerical portion of a numeric value with units?
@CoreyAlix Apparently. Of course, it's really just a naming convention. This is the first I've heard of something like that and I've been doing math a long time. We usually just call it a number!
Oct
29
comment Find the generating set $\langle S\rangle$.
Well, what is the definition of a generator then?!
Oct
29
answered What is the word for the numerical portion of a numeric value with units?
Oct
27
comment How to make a polar symmetry proof
What does your book say?
Oct
27
comment How to make a polar symmetry proof
Start with the definition of what it means to be symmetric.
Oct
25
comment Bad at computations… but not math?
Don't do PDEs....
Oct
23
comment But how to prove that $int(X) \subset int(int(X))$?
Make a smaller $\epsilon$ ball.
Oct
23
comment Estimates for the wave equation
You should just be able to use Poincare I guess.
Oct
22
comment Calculate days needed for the 4 workers to complete an 80 person-months job
@BrianM.Scott Agreed. Time to send a letter to the author.
Oct
22
answered Calculate days needed for the 4 workers to complete an 80 person-months job
Oct
22
answered propositional-calculus/logic riddle
Oct
22
comment Convergence of a non explicit sequence
Use the definition of the limit. As $n$ gets large, the points must cluster around smaller and smaller neighborhoods of $a$. Since $a > 0$, then after some point, the members of the sequence must be too. Now put all this into formal math.