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ncmathsadist
  • Member for 13 years, 6 months
  • Last seen more than a week ago
108 votes

Examples of patterns that eventually fail

92 votes
Accepted

Why is $L^{\infty}$ not separable?

88 votes

Collection of surprising identities and equations.

65 votes

Is there a mathematical symbol for "For every element"?

55 votes
Accepted

What is the purpose of the first test in an inductive proof?

54 votes

Your favourite application of the Baire Category Theorem

54 votes

Prove: $\int_0^\infty \sin (x^2) \, dx$ converges.

44 votes
Accepted

Prime factorization of 1

41 votes
Accepted

Why $0!$ is equal to $1$?

41 votes

Interesting "real life" applications of serious theorems

35 votes
Accepted

Changing a number between arbitrary bases

33 votes
Accepted

When do we get extraneous roots?

28 votes

Homomorphisms between fields are injective.

27 votes

Piecewise functions: Got an example of a real world piecewise function?

26 votes

Why is the complex number $z=a+bi$ equivalent to the matrix form $\left(\begin{smallmatrix}a &-b\\b&a\end{smallmatrix}\right)$

25 votes

$\sqrt{x}$ isn't Lipschitz function

24 votes
Accepted

Summation Theorem how to get formula for exponent greater than 3

20 votes
Accepted

Pseudo-Cauchy sequence

20 votes
Accepted

Does Bounded Covergence Theorem hold for Riemann integral?

19 votes

The square of an integer is congruent to 0 or 1 mod 4

19 votes

Is a line parallel with itself?

19 votes
Accepted

Inequality with (1-x) as denominator

18 votes

Continuous bijection from $(0,1)$ to $[0,1]$

17 votes

How to find a random axis or unit vector in 3D?

17 votes
Accepted

Negative 1 to the power of Infinity

17 votes
Accepted

Is $a^{\ln b} = b^{\ln a}$?

16 votes
Accepted

How do I prove that a function with a finite number of discontinuities is Riemann integrable over some interval?

16 votes

Distinct permutations of the word "toffee"

16 votes

Your favourite application of the Baire Category Theorem

16 votes

Is the set of rational numbers a vector space?

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