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446105
bio website sites.google.com/site/…
location Fiji
age 37
visits member for 2 years, 2 months
seen 14 hours ago

I'm a lecturer of mathematics at the University of the South Pacific. My research interests are in algebraic topology and metric geometry.


Jul
12
comment Composition of functions which is one-to-one.
@xen please refrain from giving complete answers to what are highly likely homework problems stated without showing any effort whatsoever on the part of OP.
Jul
12
revised Are all prime numbers finite?
added 5 characters in body
Jul
10
answered Constructive proof of Euler's formula
Jul
10
comment References for coordinate-free linear algebra books
Thanks! These two sources are certainly along the lines of what I was looking for (and "A second course in linear algebra" is also very good).
Jul
10
accepted References for coordinate-free linear algebra books
Jul
10
asked References for coordinate-free linear algebra books
Jul
8
revised Computing diagonal Length of a Square
added 1 character in body
Jul
8
comment Computing diagonal Length of a Square
@RecklessReckoner I wouldn't say this has anything to do with the taxi-cab metric. OP described a process of measuring Euclidean distance by means of approximating a curve by other curves and observing that length does not commute with uniform limits. The fact that with the taxi-cab metric it so happens that in this case length does commute, is an accident. It does not resolve OP's observation.
Jul
8
answered Computing diagonal Length of a Square
Jul
7
answered Is $\mathbb{C}$ equal to $\mathbb{R}^2$?
Jul
6
comment Constructing an Algebraically Closed Space
what do you mean by algebraic closure of the natural numbers? and why did you tag this as 'constructive-mathematics'? how constructive do you want the construction to be?
Jul
2
awarded  Curious
Jul
1
revised Does any uncountable set contain two disjoint uncountable sets?
edited body
Jul
1
comment Does $f^{-1}(Y)$ make sense if $Y$ is “bigger” than $X$
By definition, $f^{-1}(Y)=\{x\in X\mid f(x)\in Y\}=X$.
Jun
30
comment Probability of two cot deaths in one family
The idiocy in this course case is beyond belief. The same expert could use a similar argument to defend the lottery company from giving out the first prize to whoever won it on the grounds that the probability of winning the first prize is so small, that it can't just happen.
Jun
29
comment Can I define a category as a monoid with partially defined multiplication?
yes, you can. Though renaming 'category' to 'monoidoid' is unlikely to be popular.
Jun
28
comment Uniform Continuity $\implies$ Continuity
what did you try?
Jun
27
comment Why does Fld not have an initial object?
How would it map into $\mathbb Z_3$? and if you have an answer to that, then why won't it map in two different ways into $\mathbb Z_2$?
Jun
26
comment can anyone give me examples of open subspace of a metric space
in any metric space $X$, the set $X$ is an open subset open. So is $\emptyset$.
Jun
26
comment Some questions in set theory about belonging
I suggest you read about non-well-founded sets.