Mathematics
Dominic van der Zypen's user avatar
Dominic van der Zypen's user avatar
Dominic van der Zypen's user avatar
Dominic van der Zypen
  • Member for 9 years, 4 months
  • Last seen more than a week ago
Profile Activity

23 Answers

Score Activity Newest
4 votes
Accepted

Generiloze: the difference of two squares is equal to a odd number.

3 votes

Homeomorphism on a compact non-connected metric space

2 votes
Accepted

Chromatic number of a $K_r$-free graph

2 votes
Accepted

Constructing all compact Hausdorff spaces from a generalised sequential-limit operator

2 votes
Accepted

Prove that the binary relation "is a subset of" is a...

2 votes
Accepted

Neighbourhood filter system exercise

2 votes

Isomorphisms of well ordered sets

1 vote
Accepted

Topological properties of $(0,1)\times \{0\}$

1 vote

Why is an image called an "image"?

1 vote

Colimits in the category of "sets with partial mappings"

1 vote

Complement of universal set

1 vote

Finite topologies --- what are they good for?

1 vote

How would I show that R is an equivalence relation?

1 vote

What's an example of a Quotient/Identification Space for this topological space?

1 vote

$\lim_{n\to \infty} 1/n(1+1/2+...+1/n)$

1 vote
Accepted

Show $\left|B-A\right| = \left|B'-A'\right|$

1 vote
Accepted

Do pointwise topology and product topology coincide on $[0,1]^{[0,1]}$?

1 vote

Munkres order topology difference between definition of simple order using $<$ instead of $\leq$

0 votes

Follow up on "Proof of $X \times X \hookrightarrow X$ implies $[X]^2 \hookrightarrow X$"

0 votes
Accepted

Are homeomorphic, Hausdorff topologies on a set equal?

0 votes
Accepted

Let $d(a,X)=\inf\{|x-a| / x \in X\}$ then $d(a,X)=0$ iff $a \in \bar{X}$

-1 votes

Given 7 sales reps and 9 technicians, in how many ways can we choose 2 employees such that we have at least 1 sales rep?

-2 votes

Show that if $x$ is a limit point of $A\subset X$ and $f:X \rightarrow Y$ is continuous then $f(x)$ is a limit point of $f(A)$

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