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Make a deal with Pieter Belmans
🔒 Paid proposals held safely in escrow — released only when the work's approved.
Followers
30
Account age
4 yrs
💰 Suggested sponsorship rate
$40 – $65 / sponsored post
Estimated from audience size & typical reach — every deal is negotiable and held in SocialDB escrow.
🧰 Free analysis for Pieter Belmans
📊 Post engagement
6
Avg engagement / post
20%
Engagement vs followers
Apr 2022
On Mastodon since
🔥 Top post: I am advertising a 3-year postdoc position to work with me (and · 18 likes + reposts
📊 Activity & format
Posting cadence
0.19 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly text
Recent: 12 text · 0 image · 0 video.
Follower / following
0.9×
Follows 35 back. A more reciprocal / networked account.
Recent posts
View on Mastodon ↗
Source is also not available, but the HTML version _is_ (despite the error version suggesting otherwise).
The arXiv is not serving any pdf's for today's preprints? That's an interesting development for a preprint server!
I like to number every equation in my papers. Journals insist on only numbering equations that are referred to in the paper.
Now I am writing a paper in which I have to refer to an unnumbered equation from one of my papers... Also, referee…
This Friday afternoon, I decided to play around with Claude Opus 4.6, to see if an idea I had using metaprogramming and StaticArrays.jl in Julia to optimize something from Oscar.jl, on which a PhD student and I are building something new, …
Utrecht is hiring an assistant professor in pure mathematics, see https://www.uu.nl/en/organisation/working-at-utrecht-university/jobs/assistant-professor-in-pure-mathematics
I can attest that Utrecht is a great place to work. Please consi…
There will be 2 postdoc positions to work with me in Utrecht, both for at least 2 years. One focuses on (higher-dimensional) noncommutative algebraic geometry, the other on Hilbert schemes of points on (noncommutative) surfaces.
Contact me…
Utrecht University is hiring an assistant professor in (arithmetic) algebraic geometry and number theory. See https://www.uu.nl/en/organisation/working-at-utrecht-university/jobs/assistant-professor-in-arithmetic-algebraic-geometry-and-num…
ChatGPT just hallucinated a Dutch word in a response. Is that something that also happens in English (I haven't noticed in any case), or is it an artefact of there being less Dutch training data?
FYI: it came up with 'uitpluisteren', inste…
There is also a PhD position at the University of Luxembourg (my former employer) where I'll be the acting supervisor, so with plenty of stays at Utrecht University
See https://pbelmans.ncag.info/blog/2025/06/19/phd-position-grace/ for mor…
Do you want to join me as a postdoc or PhD student at Utrecht University?
Check out https://pbelmans.ncag.info/blog/2025/06/18/phd-and-pd/ for more information!
I have joined the editorial board of Journal of Noncommutative Geometry (https://ems.press/journals/jncg): send all your great papers on noncommutative algebraic geometry there!
🐘 Community & instance
Home server
mathstodon.xyz
Their home server on the fediverse — the instance a creator picks signals the community they belong to.
On Mastodon since
Apr 2022
An established account with real history on the platform.
💡 Facts
🗓️Joined Mastodon in 2022 — 4 years ago.
👁️Averages 6 views per post.
📤Posts about 0.2× per week.
🕵️ Fake follower check
Estimated76/100
Good
Credibility score
97%
Real
Real audience
Low
Fake-follower risk
Medium
Data confidence
- Est. 97% real, active audience · Low fake-follower risk.
- Strong engagement (~0.2× of followers engage each post) — an active, real audience.
- Established account (4+ years old).
Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.
🔀 Audience overlap
EstimatedEstimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.
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