Pith Number

pith:V4ODKGBD

pith:2019:V4ODKGBDN6HG2CVRJUIQR3XZVM

not attested not anchored not stored refs pending

The Equivariant Fundamental Groupoid as an Orbifold Invariant

Dorette Pronk, Laura Scull

arxiv:1908.01201 v1 · 2019-08-03 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V4ODKGBDN6HG2CVRJUIQR3XZVM}

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	2026-07-04T23:51:27.932891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af1c3518236f8e6d0ab14d1108eef9ab29edd3b14f7d42b689c1b51fa02aaa65

Aliases

arxiv: 1908.01201 · arxiv_version: 1908.01201v1 · doi: 10.48550/arxiv.1908.01201 · pith_short_12: V4ODKGBDN6HG · pith_short_16: V4ODKGBDN6HG2CVR · pith_short_8: V4ODKGBD

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/V4ODKGBDN6HG2CVRJUIQR3XZVM \
  | 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: af1c3518236f8e6d0ab14d1108eef9ab29edd3b14f7d42b689c1b51fa02aaa65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e9112436aa5f1412c840fed3c919d90a30bed0f171f600d435e281683a1e389",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-08-03T17:15:30Z",
    "title_canon_sha256": "64917a690caf4cdb0f66348d97ae249466955a079903abeda31693f75d6b5722"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01201",
    "kind": "arxiv",
    "version": 1
  }
}