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Jan
20
comment Is there an interval that contains more squares of primes than primes?
Sorry, didn't mean to "spank." I probably should have said, "Maybe there were additional constraints that you meant to describe?"
Jan
17
comment How to parameterize an orange peel
This answer was given a long time ago, but I'm curious... would a loxodrome really "start in (0,0,−1) and end in (0,0,1)"? Looking at the linked article on spherical spirals, it seems that those curves never quite reach the poles.
Jan
17
comment Is there an interval that contains more squares of primes than primes?
Trivially, yes. Any interval where $a = p^2-1$ and $b = p^2+1$, for some prime $p$.
Oct
28
awarded  Notable Question
Oct
3
comment Mean Inequality
@BjörnFriedrich: please be careful, when editing a post, not to change the meaning of equations unless it's really obvious the OP meant something different from what they said.
Jul
24
awarded  Nice Question
Jul
18
comment what size is a “unit torus”?
Interesting answer ... thanks.
Jun
17
revised What's the smallest number with first digit 1 that triples when this digit is moved to the end?
clarified title: "put in" sounds like maybe it means "appended"
Jun
17
suggested approved edit on What's the smallest number with first digit 1 that triples when this digit is moved to the end?
Jun
1
awarded  Yearling
May
25
comment Identification of a quadrilateral as a trapezoid, rectangle, or square
I would be curious to ask, (1) why and (2) how was she "publicly humiliated" in front of the class? (1) How did she present and argue for her answer? If she did that badly (e.g. arrogantly, confrontationally, or tactlessly), then this would be an important learning opportunity for her. (Not that it excuses the teacher.) I've been in that boat and had to learn the hard way. (2) Do you mean someone intentionally insulted and shamed her, or do you just mean she was embarrassed because people concluded she was wrong? The former is a real problem; the latter, more of a life lesson.
Mar
14
comment Why do 4 circles cover the surface of a sphere?
A "plate" here just means a very short cylinder, right?
Mar
14
comment Surface area of quarter of a Sphere
What did you use to make the diagram?
Jan
7
comment Is arrow notation for vectors “not mathematically mature”?
Maybe not the only question, but I agree that clarity is much more important than projecting a professional image.
Jan
7
comment Is arrow notation for vectors “not mathematically mature”?
While this answer is true, I don't think it's an answer to the question asked.
Dec
8
awarded  Caucus
Nov
25
comment The number of the circles which are tangent to two circles and to a line
Are the two circles allowed to be tangent to the line? (I don't know if that changes the answer.)
Jul
2
awarded  Curious
May
27
comment What is mathematical research like?
@DisplayName, can you explain why the mathematician has hope of finding the cat? As opposed to, say, a physicist, an engineer, or an animal trainer. I'm not seeing it. The mathematician is well-versed in logic and proofs, but this won't help find the cat in the complete absence of empirical data. I think we're straying from the original point, but since I don't understand the original point it's hard to get back there. Maybe the search for the meaning of this quote is like a search for a cat that doesn't exist.
Feb
18
revised What is wrong with this equations?
attempting to improve wording