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Lord_Farin's user avatar
Lord_Farin's user avatar
Lord_Farin
  • Member for 11 years, 4 months
  • Last seen more than 1 year ago
53 votes
Accepted

Is there a common symbol for concatenating two (finite) sequences?

32 votes

explaining the derivative of $x^x$

24 votes
Accepted

Limit involving power tower: $\lim\limits_{n\to\infty} \frac{n+1}n^{\frac n{n-1}^\cdots}$

23 votes

What really is mathematical rigor? How can I be more rigorous?

21 votes
Accepted

Cardinality of set of discontinuities of cadlag functions

17 votes
Accepted

Is my proof correct for: $\sqrt[7]{7!} < \sqrt[8]{8!}$

17 votes
Accepted

If we have $A \cap B =\{e \}$, then $ab=ba$?

16 votes

Is the set of integers Cauchy complete?

15 votes
Accepted

Gödel's Paradox --- Every set of formulas is consistent

14 votes

Why cannot a set be its own element?

13 votes
Accepted

How can i simplify $b^\frac{\ln a}{\ln b}$?

13 votes

Why is only the first (highest) term of the divisor in polynomial long division used to divide?

13 votes

Definition of the Coproduct of Categories?

12 votes

Problem understanding the concept of a union

12 votes
Accepted

What does w.l.g mean?

12 votes

Does $\lim \frac {a_n}{b_n}=1$ imply $\lim \frac {f(a_n)}{f(b_n)}=1$?

11 votes

Does $\int_{a}^{b} f(x)\,\mathrm dx=0$ imply $f(c)=0$ for some $a < c < b$?

10 votes

Difference between a proposition and an assertion

10 votes
Accepted

Every equalizer is monic

10 votes
Accepted

"Set" vs "collection" terminology: what is the difference?

9 votes

Game between 2014 card players where everyone with at least 2 cards passes a card to each of his neighbors

9 votes

Cardinality of the set of prime numbers

9 votes
Accepted

Why do we need an open interval to define local maxima?

8 votes

Showing that a $3^n$ digit number whose digits are all equal is divisible by $3^n$

8 votes
Accepted

Finding $A,B,C,D \subseteq \{1,2,...n\}$ such that $A \cup B \cup C \cup D = \{1,2,...,n\}$

8 votes
Accepted

how to prove $\frac {(a_1+...+a_k-1)!}{a_1!...a_k!} \in \Bbb N$

8 votes
Accepted

Binomial Coefficients Combinatorics

8 votes

Meaning of 'pullback of a pullback square'

8 votes
Accepted

Notation of Set without arg max element?

8 votes
Accepted

About NOT elimination/introduction and RAA rules on Natural Deduction

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