Stack Exchange

David Steinberg

USA

Mathematics instructor at an American state university.

top accounts reputation activity subscriptions
Top Questions
65 votes

If we randomly select 25 integers between 1 and 100, how many consecutive integers should we expect?

probability asked Dec 8, 2015 at 20:21
math.stackexchange.com

52 votes

History of "without loss of generality"

ho.history-overview asked May 7, 2014 at 23:31
mathoverflow.net

44 votes

Is there any way to pressure textbook publishers to reduce price?

united-states books publishers fees asked Sep 27, 2014 at 17:48
academia.stackexchange.com

32 votes

Alternatives to University Lectures: Non-lecture Mathematics Classes

undergraduate-education course-design asked Mar 14, 2014 at 17:10
matheducators.stackexchange.com

19 votes

"Correct the following mistake"-style questions?

problem-design asked Mar 16, 2014 at 20:23
matheducators.stackexchange.com

19 votes

Concrete vectors spaces without an obvious basis or many "obvious" bases?

undergraduate-education examples linear-algebra asked Mar 8, 2022 at 19:54
matheducators.stackexchange.com

18 votes

Algebraic varieties which are topological manifolds

ag.algebraic-geometry manifolds examples asked Dec 1, 2009 at 19:56
mathoverflow.net

17 votes

How to assign grades to proofs: what do(es) the literature/experts suggest?

reference-request proofs grading asked Jan 31, 2015 at 22:00
matheducators.stackexchange.com

17 votes

Examples of basic non-commutative rings

undergraduate-education examples abstract-algebra asked Oct 14, 2017 at 17:37
matheducators.stackexchange.com

16 votes

MNOP conjecture

ag.algebraic-geometry gromov-witten-theory moduli-spaces open-problem asked Feb 25, 2010 at 0:11
mathoverflow.net

1 2 3 4

Top Answers
42
Why are equations written by equating something to zero?
math.stackexchange.com

23
Examples of Innumeracy
matheducators.stackexchange.com

19
What books are like Knuth's Surreal Numbers?
matheducators.stackexchange.com

15
Examples of basic non-commutative rings
matheducators.stackexchange.com

12
Justifying a theory by a seemingly unrelated example
mathoverflow.net

12
Why not write “or” inequalities as $a>x>b$?
matheducators.stackexchange.com

11
What could be good non-mathematical analogies to explain the difference between the words theorem, proposition, lemma and corollaries?
matheducators.stackexchange.com

10
Studying topology: which first, algebraic or differential?
mathoverflow.net

9
Introduction to deformation theory (of algebras)?
mathoverflow.net

7
Would taking 5 minutes to explain the history behind a mathematical idea help stimulate learning the idea?
matheducators.stackexchange.com

6
Why is $\mathbb{R}^n$ not homeomorphic to $\mathbb{R}^m$?
mathoverflow.net

6
How much detail should you show in algebra steps while teaching?
matheducators.stackexchange.com

6
Where can I find resources for creating a mathematics “bridge course”?
matheducators.stackexchange.com

6
Cartesian product set
matheducators.stackexchange.com

6
Supplemental text for undergraduate real analysis
matheducators.stackexchange.com

5
Ambiguous definition of "nerve of an open covering" on wikipedia?
mathoverflow.net

5
Uninsulting way to say "this will eventually be easy"
matheducators.stackexchange.com

5
What are the questions one should ask of oneself in trying to understand definitions and lemmas?
matheducators.stackexchange.com

5
Examples of quasi-projective varieties that are not (topologically) quasi-affine
math.stackexchange.com

5
Why möbius transformation is isomorphic to projective linear group?
math.stackexchange.com

5
How to build a protractor without a protractor?
math.stackexchange.com