3h
comment is the upper limit projection Borel
So, you want official sources, you don't want someone to merely write a proof here.... OK, if you say so.
3h
comment Proper way to express 0 in this case?
If $a$ is one of the elements of the set, you may not want to use $a$ as your dummy variable.
8h
comment How to Express Undirected Integration
I guess we should think of a situation where $x$ is a function of another variable, and $f$ could go back and forth through parts of $[a,b]$ several times?
10h
comment There is no nonconstant entire function $f$ such that $f(z+1)=f(z)$ and $f(z+i)=f(z)$
An aside: Such function are studied as doubly periodic functions. As you showed, they cannot be entire. But they can be meromorphic in the plane.
14h
comment What does "to be of service" means?
And using "One" for "I" may make it sound distinguished, or may make it sound stilted. You choose.
14h
answered About a $\sigma$-finite measure
16h
revised Approximating rational values in ]0,1[ by a sum or difference of unit fractions
edited tags
16h
comment Approximating rational values in ]0,1[ by a sum or difference of unit fractions
This is not what one means by "approximation theory". So I added "diophantine-approximation" ... maybe that's what this is?
1d
comment Which of the following functions is/are solutions to the differential equation $(y'')^2-1-y^2=0$?
What do you get for $y''$ in each of the four cases?
1d
answered Integral of $1/(1+x \tan(x))^2$
2d
comment Strictly concave up implies non negative 2nd derivative
A hint is maybe the pictures here math.stackexchange.com/a/615161/442
2d
comment Recommended pronunciation of international English for foreigners
American vowels and British consonants should be fine. (As long as you are not trying to pass as a native speaker.)
2d
comment Strictly concave up implies non negative 2nd derivative
Maybe a start would be to show: strictly concave up (and differentiable) implies the derivative is strictly increasing.
2d
comment how to solve f(f(x))=x^2+x
The post cited as duplicate is barely relevant. Much better is this: math.stackexchange.com/q/208996/442
2d
comment On the usage of words instead of numbers to denote numbers
@Hayden (and flawr): Yes, non-mathematical writing has general rules like this. Kolmin says it is illogical for mathematical writing. I say to Kolmin: go ahead and to it your way, but don't complain when others do it in other ways,
2d
comment On the usage of words instead of numbers to denote numbers
Be glad we are not required to say "unity", as mathematicians used to do when writing the number $1$ as a word.
2d
comment McShane vs. Henstock-Kurzweil: Lebesgue integrable
Once you know McShane integral = Lebesgue integral, it is just one step to the result that the gauge integral extends the Lebesgue integral.
2d
comment Are older senses of "anent" still alive in any dialect?
My dictionary also has the variant anenst.
2d
comment McShane vs. Henstock-Kurzweil: Lebesgue integrable
Understand that "superior" is taken to mean "more functions are integrable", but not necessarily "better".
Aug
26
comment How do I set an iCloud e-mail?
Perhaps try: Settings > iCloud for a start.
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