Pith Number

pith:BEFVFVDW

pith:2015:BEFVFVDWCUYJPVCR2LLWEV7UU3

not attested not anchored not stored refs pending

A counterexample to the reconstruction of $\omega$-categorical structures from their endomorphism monoids

David Evans, Manuel Bodirsky, Michael Kompatscher, Michael Pinsker

arxiv:1510.00356 v2 · 2015-10-01 · 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{BEFVFVDWCUYJPVCR2LLWEV7UU3}

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	2026-05-18T01:11:38.673461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

090b52d476153097d451d2d76257f4a6eda694552d42f934fc7b6f41ac75992c

Aliases

arxiv: 1510.00356 · arxiv_version: 1510.00356v2 · doi: 10.48550/arxiv.1510.00356 · pith_short_12: BEFVFVDWCUYJ · pith_short_16: BEFVFVDWCUYJPVCR · pith_short_8: BEFVFVDW

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/BEFVFVDWCUYJPVCR2LLWEV7UU3 \
  | 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: 090b52d476153097d451d2d76257f4a6eda694552d42f934fc7b6f41ac75992c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1344899015faa9b74bf424eb11b1ae35e35669c8307a9ba5901c63fdc0a5f5a5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-10-01T18:20:20Z",
    "title_canon_sha256": "f740262837b2764567d112ba89db28cd161162414103f79f77975c50354cd775"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.00356",
    "kind": "arxiv",
    "version": 2
  }
}