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Martin Argerami's user avatar
Martin Argerami's user avatar
Martin Argerami's user avatar
Martin Argerami
  • Member for 12 years, 4 months
  • Last seen this week
104 votes

In plain English, why does conversion from hexadecimal to binary work so cleanly?

90 votes

Zero divided by zero must be equal to zero

62 votes

Solving $(z+1)^5 = z^5$

50 votes
Accepted

$1/i=i$. I must be wrong but why?

48 votes
Accepted

Prove that a polynomial has at least one nonreal complex root

43 votes
Accepted

Volterra Operator is compact but has no eigenvalue

42 votes
Accepted

Why does the Hilbert curve fill the whole square?

41 votes

Why is the Frobenius norm of a matrix greater than or equal to the spectral norm?

40 votes
Accepted

Diagonalizable matrices with complex values are dense in set of $n\times n$ complex matrices.

40 votes
Accepted

Evaluating definite integrals using Fundamental Theorem of Calculus

37 votes

What made you choose your research field?

36 votes
Accepted

If $A$ and $B$ are positive definite, then is $B^{-1} - A^{-1}$ positive semidefinite?

35 votes

Proof of when is $A=X^TX$ invertible?

35 votes
Accepted

What will be the value of the following determinant without expanding it?

34 votes

Examples of mathematical results discovered "late"

32 votes

How to prove that either $2^{500} + 15$ or $2^{500} + 16$ isn't a perfect square?

32 votes
Accepted

Determining precisely where $\sum_{n=1}^\infty\frac{z^n}{n}$ converges?

31 votes

Integer solutions to $\sqrt{a} + \sqrt{b} = \sqrt{c}$

30 votes
Accepted

Showing a function is measurable in a product measure space

29 votes

Orthogonal matrix norm

28 votes
Accepted

Question about proof that finite-dimensional subspaces of normed vector spaces are direct summands

28 votes
Accepted

Why don't we study 'metric vector spaces' on their own?

27 votes

Algebra Vs Analysis

26 votes

Should I do all the exercises in a textbook?

23 votes

Dini's Theorem - Proof.

22 votes

What is the difference between a point and a vector?

22 votes

Do polynomials in two variables always factor in linear terms?

21 votes
Accepted

What is the intuitive interpretation of the transpose compared to the inverse?

20 votes
Accepted

Does certain matrix commutes with square root of another one?

19 votes

Mazur's Lemma (can't find a proof anywhere)

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