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Mathematics
Izaak van Dongen's user avatar
Izaak van Dongen's user avatar
Izaak van Dongen's user avatar
Izaak van Dongen
  • Member for 6 years, 11 months
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About

My profile picture represents my thoughts on metaclasses/my thoughts on vector calculus/my undying love for Pokémon.

I am a frequent open-source contributor, but mostly I like maths.

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Top posts
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18
The set of all groups
Dec 9, 2023
17
Prime factor wanted of the huge number $\sum_{j=1}^{10} j!^{j!}$
Mar 25
14
A formula for any finite sequence of number
Feb 15, 2020
11
On the isomorphism $\mathbb{R} \cong \mathbb{R}^2$
Feb 21
10
Determining the minor radius of an ellipse from its major axis and a tangent line
Oct 26, 2023
8
Reference for a combinatorial identity involving the number of derangements
Mar 9
7
Can we make this subspace $\aleph_0$-dimensional?
Mar 27
6
Is there a nondiscrete linearly ordered topological space (LOTS) that is extremally disconnected?
May 9
6
Is $\mathrm{Z}$ an elementary submodel of $\mathrm{Z} [x_1, x_2, \dots]$?
Oct 20, 2023
6
For which topologies do self-homeomorphisms preserve the collection of open sets?
Apr 13
Top network posts
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12
Pythonic way of ignoring the last element when doing set difference
9
How to count the most commonly used words in a text file?
7
Checking equality of unsorted lists of dictionaries in python
7
How to avoid restarting python shell after each import
6
Convert two timestamp floats to a readable number of years, months, and days