Pith Number

pith:LEW4A4JD

pith:2015:LEW4A4JDMTVR6W36RKGH3BSDRU

not attested not anchored not stored refs pending

A topological characterisation of endomorphism monoids of countable structures

Friedrich Martin Schneider, Manuel Bodirsky

arxiv:1508.07404 v2 · 2015-08-29 · math.LO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LEW4A4JDMTVR6W36RKGH3BSDRU}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:03:29.841226Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

592dc0712364eb1f5b7e8a8c7d86438d2c8372d486ad0aebedb051acf5b51b86

Aliases

arxiv: 1508.07404 · arxiv_version: 1508.07404v2 · doi: 10.48550/arxiv.1508.07404 · pith_short_12: LEW4A4JDMTVR · pith_short_16: LEW4A4JDMTVR6W36 · pith_short_8: LEW4A4JD

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/LEW4A4JDMTVR6W36RKGH3BSDRU \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 592dc0712364eb1f5b7e8a8c7d86438d2c8372d486ad0aebedb051acf5b51b86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "521b07be3fb146148dba79b291044ebbf1dee07fe9524ca9106025fc1ef9a8c5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-08-29T06:04:32Z",
    "title_canon_sha256": "91b9e1a25e722da08fdb3602540b7904debded7b187a21fca983b9337ecc3d97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.07404",
    "kind": "arxiv",
    "version": 2
  }
}