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Stephan Kulla

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real-analysis

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74 Questions

Votes Activity Newest Views
7
25
votes
3
answers
2k
views

Supremum of all y-coordinates of the Mandelbrot set

fractals chaos-theory supremum-and-infimum complex-dynamics
Oct 30 '14 at 12:31 Sheldon L 4,267
12
22
votes
4
answers
3k
views

Is there an epsilon-delta definition of the second derivative?

calculus
Aug 3 '17 at 2:54 Community♦ 1
15
13
votes
4
answers
6k
views

Arithmetic rules for big O notation, little o notation and so on…

calculus real-analysis reference-request notation asymptotics
Jun 26 at 10:03 zkutch 7,405
5
13
votes
3
answers
4k
views

Is there an example for an undefinable number?

logic definition examples-counterexamples real-numbers philosophy
Sep 22 '19 at 11:14 Community♦ 1
 
9
votes
1
answer
1k
views

Mean value theorem for random variables (inside an expectation value)

probability-theory reference-request random-variables proof-explanation
Mar 3 '18 at 9:20 Did 264k
 
9
votes
1
answer
352
views

Solving the geometric series for q

calculus real-analysis polynomials roots
Sep 27 '16 at 9:11 Community♦ 1
3
9
votes
1
answer
706
views

Estimates for the normal approximation of the binomial distribution

probability-theory reference-request probability-distributions normal-distribution estimation
May 28 '15 at 19:14 Kevin P. Costello 5,916
1
8
votes
2
answers
3k
views

What is the notation for the empty matrix?

linear-algebra matrices notation
May 17 '16 at 10:49 E. Joseph 14.3k
1
8
votes
2
answers
1k
views

Lie algebra of R^n

differential-geometry lie-groups lie-algebras
Aug 30 '15 at 17:46 Jyrki Lahtonen 119k
1
8
votes
3
answers
383
views

Convergence of an alternating harmonic series

calculus real-analysis sequences-and-series convergence-divergence
May 14 '15 at 0:28 David Holden 17.2k
3
8
votes
2
answers
3k
views

What is the position of “exclusive or” in order of precedence for logical connectives?

logic predicate-logic
Aug 9 '14 at 7:04 MarnixKlooster ReinstateMonica 5,218
2
8
votes
1
answer
199
views

First usage of the symbol ∈

elementary-set-theory reference-request notation math-history
Apr 21 '14 at 18:40 Community♦ 1
3
8
votes
2
answers
2k
views

Explanation for the integral of differential forms

integration differential-geometry differential-forms
Mar 31 '14 at 1:35 Pratyush Sarkar 3,500
2
7
votes
1
answer
3k
views

Operator norm of the inverse

functional-analysis norm inverse
Jul 25 '19 at 7:59 Mathijs 56
1
7
votes
2
answers
2k
views

Why is the inner measure problematic?

measure-theory definition lebesgue-measure motivation outer-measure
Jun 3 '18 at 19:56 T_M 2,192
 
7
votes
1
answer
142
views

Who did first use the concept of “supremum”?

calculus reference-request math-history
Oct 23 '14 at 12:47 Community♦ 1
1
7
votes
3
answers
582
views

Search for a good analogy in the real world for the mathematical concept of set

elementary-set-theory
Jan 24 '14 at 10:09 goblin GONE 63.1k
1
6
votes
2
answers
240
views

Name for kind of big O notation with leading coefficient

calculus sequences-and-series numerical-methods asymptotics definition
Sep 8 '15 at 18:50 Community♦ 1
2
6
votes
1
answer
1k
views

Berry-Esseen bound for binomial distribution

probability-theory reference-request normal-distribution estimation binomial-distribution
Jul 14 '15 at 13:40 Community♦ 1
 
6
votes
2
answers
1k
views

Is the set {a,b} uniquely defined?

elementary-set-theory definition
Jun 1 '14 at 17:56 Asaf Karagila♦ 350k
1
6
votes
5
answers
374
views

Can every polynomial be written as $a_0 + a_1 (x-x_0) + a_2 (x-x_0)^2 +\ldots + a_n (x-x_0)^n$

polynomials taylor-expansion
Jun 5 '12 at 2:40 Michael Hardy 249k
2
5
votes
1
answer
392
views

Point of maximal error in the normal approximation of the binomial distribution

probability statistics reference-request normal-distribution central-limit-theorem
Jun 24 '19 at 23:33 Patrick 1
1
5
votes
3
answers
814
views

Finding an error estimation for the De Moivre–Laplace theorem

probability-theory statistics reference-request normal-distribution estimation
Jul 31 '18 at 9:42 Andrey Zubkov 11
2
5
votes
1
answer
421
views

Why has the Stein operator for normal approximations the form $(\mathcal Af)(x)=f^\prime(x)-xf(x)$?

functional-analysis probability-theory operator-theory normal-distribution estimation
May 27 '15 at 22:42 Alex R. 30.1k
1
4
votes
2
answers
886
views

Why is it important, that mathematics can be formalized in set theory?

set-theory philosophy foundations
May 8 '15 at 4:57 Community♦ 1
 
4
votes
1
answer
115
views

Why is closeness of an ideal useful?

functional-analysis hilbert-spaces ideals c-star-algebras
Jul 10 '13 at 19:57 Daniel Fischer♦ 193k
 
4
votes
2
answers
187
views

Solve equation $\tfrac 1x (e^x-1) = \alpha$

real-analysis inverse exponential-function
Jan 7 '13 at 16:18 Community♦ 1
1
3
votes
2
answers
164
views

Equation between the two branches of the lambert w function

real-analysis inverse
Jan 25 '20 at 8:51 g.kov 11.8k
 
3
votes
4
answers
2k
views

Proving convergence or divergence of series: Tips and Tricks

calculus real-analysis sequences-and-series convergence-divergence big-list
Dec 6 '19 at 1:23 Community♦ 1
 
3
votes
1
answer
139
views

Good example that enumerating notation of sets is not unique

elementary-set-theory soft-question
Jun 28 '19 at 17:55 Stephan Kulla 6,250
1
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