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Brian Rushton's user avatar
Brian Rushton's user avatar
Brian Rushton's user avatar
Brian Rushton
  • Member for 11 years, 4 months
  • Last seen more than 4 years ago
75 votes

How would you explain to a 9th grader the negative exponent rule?

53 votes

Effect of elementary row operations on determinant?

34 votes

What remains in a student's mind

30 votes

What is the difference between a Hamel basis and a Schauder basis?

25 votes

Why are compact sets called "compact" in topology?

17 votes

Why is $n$ divided by $n$ equal to $1$?

15 votes

Is there an example that a theorem in number theory is useful in another field in mathematics?

12 votes
Accepted

Intuition for the Universal Chord Theorem

12 votes
Accepted

Linear transformation of a polygon maximizing its area with respect to its perimeter.

10 votes

How to read a book in mathematics?

10 votes

If $ A^2=0$ , prove that $A$ doesn't neccesarily have a row of zeros

10 votes
Accepted

Field containing sum of square roots also contains individual square roots

9 votes
Accepted

L1-norm minimization

8 votes
Accepted

What is the intuitive meaning of line integral with respect to x?

8 votes
Accepted

Proof of Zorn's Lemma using the Axiom of Choice. Why is $\mathscr U$ a tower?

8 votes

$K(u,v)$ is a simple extension of fields if $u$ is separable

8 votes
Accepted

Why does Newton's method approximate $\sqrt{z}$ to be $z - \frac{z^2 - x}{2z}$?

8 votes
Accepted

Supposed proof of dirichlets theorem on primes

7 votes

Two Steps away from the Hamilton Cycle

7 votes

Connected metric spaces with disjoint open balls

7 votes

What are imaginary numbers?

7 votes

Vivid examples of vector spaces?

7 votes

History of Compass/Straight Edge Construction

7 votes

Really nice functional equation with second partial deratives.

7 votes

Lebesgue density theorem in the line

7 votes

What is the point of quadratic residues?

7 votes
Accepted

A definition of injectivity

6 votes
Accepted

Extension elements always exist for field extensions?

6 votes
Accepted

Permutation isomorphic subgroups of $S_n$ are conjugate

6 votes

What are reasons why some symbols in mathematical logic are not standardized?

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