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user76284
  • Member for 11 years, 1 month
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23 votes

Why is belonging not transitive?

19 votes

What is an example of a sequence which "thins out" and is finite?

13 votes

Does the symbol $\nabla^2$ has the same meaning in Laplace Equation and Hessian Matrix?

8 votes
Accepted

Trying to understand pathological solution(s) to $f:f\rightarrow f$

6 votes

Solution to y+2=y

5 votes

What combinatorial quantity the tetration of two natural numbers represents?

4 votes

Notation for partial function set.

4 votes
Accepted

Is there a name for the construction of objects as n-tuples with axioms from a set of elements?

4 votes

Are there "interesting" theorems in Peano arithmetic, that only use the addition operation?

4 votes
Accepted

Is there an axiomatic approach to ordinal arithmetic?

4 votes

Does $\sqsubset$ have any special meaning?

3 votes

Is there any way to define arithmetical multiplication as other thing than repeated addition?

3 votes

Are there any interesting semigroups that aren't monoids?

3 votes

Notation for element-wise function application

3 votes

The elements of a set are sets.

3 votes

Why can't differentiability be generalized as nicely as continuity?

3 votes

Symbol for set all partitions of a set

3 votes
Accepted

Explain $\Bbb Q$ is a dense set

3 votes

simplify the expression ${\sqrt{x - 2\sqrt{x -1}} +\sqrt{x + 2\sqrt{x -1}}}$

3 votes

What is $(\frac{d}{dx})^\frac{d}{dx}$?

3 votes
Accepted

Ramanujan Summation's -1/12 is not an element of the group of all positive integers. Does this prove the summation wrong?

2 votes
Accepted

What is it called when an operator is composed with a second operator and its inverse ($H^{-1} \circ T \circ H$)? What are some examples?

2 votes

What is the intuition behind the definition of a relation

2 votes

Are 'numerals' closed under exponentiation?

2 votes

Notation for all permutations of a set

2 votes

Equivalent to proportionality sign for additive constants

2 votes

$\lim \limits_{x \to 0+} \frac{1}{x}$ doesn't exist vs. $\lim \limits_{x \to 0+} \frac{1}{x} = \infty$

2 votes

the Taylor's expansion of $\log \frac{\sin(x)}x$

2 votes

Projected gradient descent with momentum

2 votes

Notation for infinite coinfinite subsets.