Thomas's user avatar
Thomas's user avatar
Thomas's user avatar
Thomas
  • Member for 12 years, 1 month
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313 votes
Accepted

Transpose of inverse vs inverse of transpose

122 votes

Solve $4^{9x-4} = 3^{9x-4}$

121 votes
Accepted

Is an irrational number odd or even?

113 votes
Accepted

Why should we prove obvious things?

98 votes
Accepted

What is the difference between minimum and infimum?

67 votes

Can someone explain Gödel's incompleteness theorems in layman terms?

66 votes
Accepted

What is vector division?

49 votes

Does $\pi$ contain all possible number combinations?

48 votes

What is Trinity Hall Prime number?

44 votes
Accepted

Find a mistake in the following bogus proof

39 votes
Accepted

Finding the order of permutations in $S_8$

34 votes

Infimum and supremum of the empty set

34 votes

A good way to retain mathematical understanding?

27 votes
Accepted

What do the symbols d/dx and dy/dx mean?

25 votes
Accepted

Why do you need to use the chain rule in differentiation of ln?

24 votes
Accepted

Uncountable minus countable set is uncountable

22 votes

Why does an infinite limit not exist?

22 votes
Accepted

How do we know all numbers alternate between odd and even numbers?

21 votes
Accepted

What does $\mathbb{R}^n \to \mathbb{R}^m$ mean? And what is $\mathbb{R}^n$?

21 votes

Does the identity element of a group have an inverse?

20 votes
Accepted

If $AB=I_n$ and $BA=I_m$ then $n=m$.

19 votes

How to convince a math teacher of this simple and obvious fact?

19 votes

Why do we limit the definition of a function?

18 votes

Proof that $n^2 < 2^n$

17 votes

How exactly can't $\delta$ depend on $x$ in the definition of uniform continuity?

17 votes

Do mathematicians, in the end, always agree?

17 votes

Math without pencil and paper

16 votes
Accepted

Don't understand the Fundamental Theorem of Calculus

16 votes
Accepted

Quantifier Notation

16 votes
Accepted

Quaternions: why does ijk = -1 and ij=k and -ji=k

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