Mathematics
Opal E's user avatar
Opal E's user avatar
Opal E's user avatar
Opal E
  • Member for 7 years, 3 months
  • Last seen this week
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About

I have a B.S. in math and in chemistry. I taught high school geometry for two years and am now in a math Ph.D. program, where I continue to teach some college courses.

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All Questions Answers
Score Newest
question
8
Proof for "Given any basis of a topological space, you can always find a subset of that basis which itself is a basis, and of minimum possible size."
Jul 26, 2016
answer
5
Show that $f(x) = |x|$ is continuous on $\mathbb R$
Jul 13, 2017
answer
3
It is given that $\frac{x^2}{2}=xy-\ln(1+xy)$.How can we write $y=f(x)?$
Jun 27, 2017
question
2
Justifying that "metric space of bounded functions" fails the second axiom of countability?
Nov 12, 2016
question
2
Showing a decomposition of a topological space is upper semicontinuous
Jul 20, 2017
question
2
Can a set be homeomorphic to a quotient map from itself? Making sense of a problem.
Jul 24, 2017
question
1
Check my logic? Mapping of subsets to subsets proof (Lemma to Cantor-Berenstein)
Mar 10, 2017
question
1
Equivalence of (Interior, closure) and (Interior, Closure, Interior, Closure) sequence
May 6, 2017
question
1
Developing intuition about free groups / the universal property
Jun 28, 2017
answer
1
Finding the mode of a distribution with calculus.
Jul 14, 2017
Top network posts
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36
Combative students in proofs classes
20
At what point is it a disservice to pass someone on to the next math class?
17
Real-world examples of more "obscure" geometric figures
16
How do I learn advanced mathematics without forgetting?
15
"Always/Sometimes/Never" vs. "True/False" questions for mathematical reasoning

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