Pith Number

pith:OTVXUIBL

pith:2014:OTVXUIBLOQL22H6LGYZOULYBWI

not attested not anchored not stored refs pending

A topological fibrewise fundamental groupoid

David Michael Roberts

arxiv:1411.5779 v3 · 2014-11-21 · math.AT · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OTVXUIBLOQL22H6LGYZOULYBWI}

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	2026-05-18T00:24:40.169305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74eb7a202b7417ad1fcb3632ea2f01b2059f89645085a22179533b17e1fcdda9

Aliases

arxiv: 1411.5779 · arxiv_version: 1411.5779v3 · doi: 10.48550/arxiv.1411.5779 · pith_short_12: OTVXUIBLOQL2 · pith_short_16: OTVXUIBLOQL22H6L · pith_short_8: OTVXUIBL

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/OTVXUIBLOQL22H6LGYZOULYBWI \
  | 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: 74eb7a202b7417ad1fcb3632ea2f01b2059f89645085a22179533b17e1fcdda9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92c309f6e0344b7c303022a4368a99caa57a390dbd73e0480ee300e72ce52971",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "math.AT",
    "submitted_at": "2014-11-21T07:13:33Z",
    "title_canon_sha256": "16a5149923915d09b2bf35f3f8f2394689bf816977ad3585957fdc6dc226d080"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.5779",
    "kind": "arxiv",
    "version": 3
  }
}