Pith Number

pith:VG5DR6UY

pith:2017:VG5DR6UYC2B762NGPW7JAD4O7J

not attested not anchored not stored refs pending

A Novikov fundamental group

Agn\`es Gadbled, H\^ong V\^an L\^e, Jean-Fran\c{c}ois Barraud, Roman Golovko

arxiv:1710.10353 v4 · 2017-10-27 · math.GT · math.DG · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VG5DR6UYC2B762NGPW7JAD4O7J}

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	2026-05-18T00:12:32.795154Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9ba38fa981683ff69a67dbe900f8efa418804e2872c6802b0b1752ff4d64f9a

Aliases

arxiv: 1710.10353 · arxiv_version: 1710.10353v4 · doi: 10.48550/arxiv.1710.10353 · pith_short_12: VG5DR6UYC2B7 · pith_short_16: VG5DR6UYC2B762NG · pith_short_8: VG5DR6UY

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/VG5DR6UYC2B762NGPW7JAD4O7J \
  | 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: a9ba38fa981683ff69a67dbe900f8efa418804e2872c6802b0b1752ff4d64f9a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15fb51bd06c3ed1a96730f86b0cc139314919bb71864d052d1256916b7af06c1",
    "cross_cats_sorted": [
      "math.DG",
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2017-10-27T22:49:59Z",
    "title_canon_sha256": "b91e7cb7eb1247b63d31fea7e9d8e867abdd9e0541b412a7097b8ba8d60cd602"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.10353",
    "kind": "arxiv",
    "version": 4
  }
}