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triple_sec
  • Member for 10 years, 10 months
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40 votes

Symbol for "probably equal to" (barring pathology)?

38 votes
Accepted

How is the epsilon-delta definition of continuity equivalent to the following statement?

33 votes

Word origin / meaning of 'kernel' in linear algebra

33 votes

Sigma algebra generated by the set of all singletons

30 votes
Accepted

Is any subset of the Cantor set a Borel set?

27 votes

Can an integer of the form $4n+3$ written as a sum of two squares?

21 votes

Expected value of game involving 100-sided die

21 votes
Accepted

Is $\sqrt x$ continuous at $0$? Because it is not defined to the left of $0$

19 votes
Accepted

Difference between a measure and a premeasure

17 votes
Accepted

When does the integral preserve strict inequalities?

16 votes
Accepted

What's the math formula that is used to calculate the monthly payment in this mortgage calculator?

15 votes
Accepted

Using Comma in if...then Conditional Sentences

15 votes

Smallest future date which involves no repetition of a digit in the format DD/MM/YYYY

14 votes
Accepted

Proving $\lim\limits_{x \to \infty} xf(x)=0$ if $\int_{0}^{\infty}f(x) dx$ converges.

14 votes
Accepted

With a standard deck of 52 cards, how many different 25 card spreads are available?

14 votes
Accepted

Connected Components for $(\Bbb R, \mathcal T_{ lower limit})$

14 votes

Principle of Transfinite Induction

14 votes

Can you explain the "Axiom of choice" in simple terms?

13 votes

'Obvious' theorems that are actually false

13 votes
Accepted

St. Petersburg Paradox

13 votes
Accepted

Proof by induction: $2^n > n^2$ for all integer $n$ greater than $4$

13 votes
Accepted

Showing that ${\rm E}[X]=\sum_{k=0}^\infty P(X>k)$ for a discrete random variable

13 votes
Accepted

What is the motivation of Measure Theory when there is probability theory?

13 votes

An Example of a Nested Decreasing Sequence of Bounded Closed Sets with Empty Intersection

12 votes
Accepted

The difference between unbiased/biased estimator variance.

11 votes

Applications of the Closed graph theorem

11 votes
Accepted

Brouwer's fixed point theorem and continuous functional dependence on the fixed point.

10 votes
Accepted

Show that a given set has full measure or measure 0

10 votes
Accepted

Prove that $f$ is a constant function if $f(x)-f(y) \leq (x-y)^2$

10 votes
Accepted

Convex function with non-symmetric Hessian

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