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J.G.'s user avatar
J.G.'s user avatar
J.G.'s user avatar
J.G.
  • Member for 11 years, 6 months
  • Last seen this week
102 votes
Accepted

What's so special about standard deviation?

65 votes
Accepted

How many "super imaginary" numbers are there?

49 votes

An integral for the New Year 2016

49 votes
Accepted

Calculating the square root of 2

47 votes
Accepted

How to attack "if true, prove it; if not true, give a counterexample" question?

40 votes
Accepted

Why doesn't the independence of the continuum hypothesis immediately imply that ZFC is unsatisfactory?

36 votes

Proof for Cauchy-Schwarz inequality for Trace

34 votes

Can any number of squares sum to a square?

32 votes
Accepted

Solve this integral for free WiFi

26 votes

Can area of rectangle be greater than the square of its diagonal?

25 votes
Accepted

How to show that $\int_{0}^{1}\sqrt{x}\sqrt{1-x}\,\mathrm dx =\frac{\pi}{8}$

24 votes

Is all of mathematics set theory in disguise?

22 votes

What does "surface area of a sphere" actually mean (in terms of elementary school mathematics)?

20 votes
Accepted

The monster continued fraction

20 votes

Is Bayes' Theorem really that interesting?

18 votes
Accepted

UK Lottery Odds Calculation Error

18 votes
Accepted

Interesting relation derived from the identity $\sin^2 x + \cos^2 x \equiv 1$

18 votes

Was there ever an axiom rendered a theorem?

17 votes

What are some of the Websites/web-tools which must be a part of every mathematician's arsenal?

16 votes

Why do we say ‘pairwise disjoint’, rather than ‘disjoint’?

16 votes

What is a logarithm in the light of group theory?

16 votes
Accepted

Calculating sum of converging series $\sum_{n=1}^{\infty}\frac{1-n}{9n^3-n}$

16 votes

Can we express $\pi$ in terms of $\sum_{n=1}^\infty\frac1{n^2}$?

15 votes
Accepted

Matrix Multiplication not associative when matrices are vectors?

14 votes

Why do the properties of determinants (used to calculate determinants from multiple matrices) apply not only to rows, but to columns as well?

14 votes
Accepted

$I=\int \frac{e^{x}+\cos(x)}{e^{x}+\cos(x)+\sin(x)}dx$

14 votes

What is the fastest algorithm for finding the natural logarithm of a big number?

14 votes

Are conjugate vectors unique?

14 votes

Is "today is Presidents' Day" a proposition, propositional function, or neither?

13 votes
Accepted

Is $\infty^\infty$ indeterminate?

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