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446105
bio website sites.google.com/site/…
location Fiji
age 37
visits member for 2 years, 3 months
seen 2 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
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.
Jun
26
comment Some questions in set theory about belonging
example of what?
Jun
26
comment Some questions in set theory about belonging
Such sets are now allowed then.
Jun
26
answered Some questions in set theory about belonging
Jun
25
comment Definition of Equals
I'm glad to be in agreement with you :)
Jun
25
comment Definition of Equals
I still don't see the disagreement then. Equality is a particular meta-choice of a relation. Is it not? Whatever our fantasy about this relation really being just identity is irrelevant and unchechable, so who cares about it?
Jun
25
comment Definition of Equals
@AsafKaragila where did I mention cardinality? (and btw, what I quoted here is how Azriel Levy explained equality to us in Logic I). I'm not sure where the disagreement is. I never intended to hint at cardinalities or size of any kind. Equality in maths is taken to be a fixed equivalence relation that is meta-agreed upon. It's intended to perfectly reflect identicalness, but whether it does so is irrelevant.
Jun
25
answered Definition of Equals
Jun
25
answered Function vs. Polynomial Space
Jun
24
awarded  Nice Answer
Jun
24
reviewed Approve suggested edit on What are the elements of a quotient space?