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location Melbourne, Australia
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visits member for 4 years, 5 months
seen Dec 2 at 8:32

Nov
3
comment Explanation of method for showing that 0 / 0 is undefined
I see that this comment was made four years ago, but I said that I would revise or defend my position on the basis of comments. So, could a simple example be provided of one particular part of mathematics that would be broken as a result?
Oct
31
awarded  Good Question
Oct
20
comment Why must the base of a logarithm be a positive real number not equal to 1?
This doesn't answer the question about why the base of the logarithm cannot be negative.
Oct
16
awarded  Notable Question
Oct
10
accepted If all vectors in a set are perpendicular to a given vector, is the set linearly dependent?
Oct
8
comment If all vectors in a set are perpendicular to a given vector, is the set linearly dependent?
Hmmm, I should have specified that I was considering three vectors over three dimensions, or two vectors over two dimensions. Not sure whether I should edit the question or pose a new one. (Although my reason for suspecting it to be true is now looking dubious, so perhaps I should just ask for a counterexample to the conjecture.)
Oct
8
asked If all vectors in a set are perpendicular to a given vector, is the set linearly dependent?
Jul
20
awarded  Yearling
Jul
2
awarded  Curious
May
19
awarded  Famous Question
Apr
29
awarded  Popular Question
Apr
9
awarded  Notable Question
Mar
30
awarded  Notable Question
Jan
8
comment What's the explanation for why n^2+1 is never divisible by 3?
I like the first three paragraphs, although I'd start the first with "For any integer $n$,". Why not conclude with "Thus, for any value of $n$, either $n^2$ or $n^2 - 1$ is a multiple of three, so the next multiple of three above $n^2$ is either $n^2+2$ or $n^2+3$."?
Dec
12
comment Are there any interesting semigroups that aren't monoids?
Although this answers the question in the title, it seems to ignore the second paragraph where I try to tighten what is meant by the question.
Sep
24
awarded  Famous Question
Sep
11
awarded  Popular Question
Jul
29
awarded  Notable Question
Jul
20
awarded  Yearling
May
20
awarded  Good Question