Stack Exchange — proofassistants.stackexchange.com

A Stack Exchange (proofassistants.stackexchange.com) dataset of 447 users, 993 answer-collaboration edges, 942 questions, 1,303 answers, collected by Stack Exchange, Inc. via the annual Stack Exchange Data Dump. Each record contains user nodes (reputation, badge counts, vote history), directed weighted edges (answerer→asker, weight=answer score, count=interactions, accepted=bool), post text, tag distribution. User collaboration network from proofassistants.stackexchange.com — directed weighted graph where edges represent knowledge-sharing relationships (A answered B's question), with edge weight reflecting answer quality. Enables prestige hierarchy, community detection, and expertise flow analysis.. Suitable for expertise network analysis, reputation systems, community detection, knowledge flow, PageRank-based authority ranking, Q&A platform dynamics..

#Formal verification#Mathematics#Proof assistant#Reputation#Stack exchange data dump

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Analytics

The interactive network needs JavaScript.

· graph.json

Node size is centrality, colour is community. Hover a node for details; click one to isolate its community.

447
Nodes
993
Edges
4.98e-03
Density
5
Components
-0.1781
Assortativity
2.8%
Reciprocity
196
Bridges
Most central nodes
320.07848
1530.0583
490.05381
4670.05157
50.04484
150.0426
780.04036
1250.03812
1220.03363
40.03363
Content metrics

2,245 records scored · min–maxmean ± 0.675 σ (the interquartile range if the values are roughly normal)mean

scoreμ 5.875 ± 6.429
min -5max 63
view countμ 129.82 ± 363.76
min 0max 7.3K
answer countavg 0.58 / 10
0std 0.9910
comment countμ 2.307 ± 3.026
min 0max 23
9.9
Flesch–Kincaid grade
US school grade level
10.5
Automated readability index
Frequent terms
typequotproofleanlikecoqnattheoryusetypessetquestionexampletheoremdefinitionthinklistwayinductivefunctiondonforallanswercodewantproveknowagdacaseproofslogicworkneedlanguageinductiontruetermequalitypropassistantsassistantendapplylemmasystemdifferentdatadependentdefinerewrite
Topic clusters

Topic 0

type
theory
universe
set
equality
axiom
logic
category

Topic 1

question
answer
thank
edit
comment
ask
think
tag

Topic 2

nat
type
list
forall
lemma
proof
apply
match

Topic 3

proof
assistant
theorem
mathematic
language
prover
system
use

Topic 4

lean
file
code
mathlib
project
run
version
work

Topic 5

agda
type
set
pos
neg
zero
datum
rint

Topic 6

inductive
type
induction
coinductive
eta
definition
mutual
recursive

Topic 7

coq
opam
ocaml
gappa
version
file
platform
code
Top hashtags
#eval103
#check76
#print57
#narrow36
#reduce13
#17
#coq7
#help5
#24
#34
#394
#file4
#lean4
#sum4
#43
#creating3
#issuecomment3
#l3
#marios3
#algebraic_closure2

Computed over the full corpus.

Record

Catalog key
stackexchange-proofassistants-stackexchange-com
Authors
Stack Exchange, Inc.
Year
2025
Source paper
Stack Exchange Data Dump
License
CC BY-SA 2.5 / 3.0 / 4.0 (by post date) (CC-BY-SA-2.5 AND CC-BY-SA-3.0 AND CC-BY-SA-4.0)
Records
9,001
Nodes
447
Edges
993 (directed)
Nodes are
user (Stack Exchange account)
Edges are
answer collaboration (A answered B's question)
Attributes
nodes have attributes; edges have attributes
Text corpus
question titles, post bodies, comment text, tag names
Languages
en
Collected
2022/2024 (2020s)
Tasks
From the graph: link prediction, community detection
Region
Global (inferred: the platform is used worldwide)

Provenance

Originally published at
https://archive.org/download/stackexchange link checked
Hosted copy
Mirrored on echo.directory on 2026-10-09, 3.6 MB across 1 files. Checksums in MANIFEST.json.

How to cite

BibTeX

@misc{echo2026,
  title  = {ECHO: Exploratory Compendium of Humanity Online},
  author = {Switzer, Braden and Zafarani, Reza},
  year   = {2026},
  url    = {https://echo.directory},
  note   = {Syracuse University}
}

@misc{stackexchange_2025,
  title     = {Stack Exchange Data Dump},
  author    = {{Stack Exchange, Inc.}},
  year      = {2025},
  publisher = {Internet Archive},
  url       = {https://archive.org/download/stackexchange}
}

APA

Switzer, B., & Zafarani, R. (2026). ECHO: Exploratory Compendium of Humanity Online [Data repository]. Syracuse University. https://echo.directory

Stack Exchange, Inc. (2025). Stack Exchange — proofassistants.stackexchange.com [Data set]. https://stackexchange-proofassistants-stackexchange-com.echo.directory/

MLA

Switzer, Braden, and Reza Zafarani. ECHO: Exploratory Compendium of Humanity Online. Syracuse University, 2026, echo.directory.

Stack Exchange, Inc. Stack Exchange — proofassistants.stackexchange.com. 2025, stackexchange-proofassistants-stackexchange-com.echo.directory/.

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