Colin Tan

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Name Colin Tan
Member for 3 years
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Location National University of Singapore
Age 28
I am a graduate student at the National University of Singapore studying complex geometry with To Wing Keung.
Apr
12
comment Definability in a language with a single binary predicate
Thank you Emil for your answer. In my question, the relation $(n+1)Pn$ holds only for nonzero $n$. The directed graph of $P$ looks something like two copies of the natural numbers, but with the directions reversed. I'm sorry I didn't emphasize the nonzero condition.
Apr
8
asked Definability in a language with a single binary predicate
Mar
16
awarded  Popular Question
Jan
13
awarded  Popular Question
Jan
10
comment Why is a topology made up of ‘open’ sets?
In fact, if binary intersections exist, then all finite interesections of nonempty collections exists. But not neccessarily the whole space, i.e. the intersection of the empty collection.
Jan
10
asked Can positivity be detected by agreement of p-adic order?: A question on binomial coefficients
Dec
19
awarded  Nice Question
Dec
12
awarded  Yearling
Nov
30
awarded  Notable Question