Pith Number

pith:UIWXWJCY

pith:2017:UIWXWJCYLTQ3GAFHPUA6X6Q7MV

not attested not anchored not stored refs pending

Semistability and CAT(0) Geometry

Ross Geoghegan

arxiv:1703.07003 v1 · 2017-03-20 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UIWXWJCYLTQ3GAFHPUA6X6Q7MV}

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	2026-05-18T00:48:11.655045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a22d7b24585ce1b300a77d01ebfa1f6561b90105057f8ff064b2a682daf3363d

Aliases

arxiv: 1703.07003 · arxiv_version: 1703.07003v1 · doi: 10.48550/arxiv.1703.07003 · pith_short_12: UIWXWJCYLTQ3 · pith_short_16: UIWXWJCYLTQ3GAFH · pith_short_8: UIWXWJCY

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/UIWXWJCYLTQ3GAFHPUA6X6Q7MV \
  | 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: a22d7b24585ce1b300a77d01ebfa1f6561b90105057f8ff064b2a682daf3363d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffeda7a58dc23a02816b6b913ad21edb7f8139ff81388245583ea750bdaa44fd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2017-03-20T23:28:25Z",
    "title_canon_sha256": "3cb26704d7bdd4a2bac4687cb09f9958c49f723fac8c937ae4a01a8b4abe2009"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.07003",
    "kind": "arxiv",
    "version": 1
  }
}