Pith Number

pith:GHC4JUSP

pith:2014:GHC4JUSP74BOZ33CX3P7ULZ2LM

not attested not anchored not stored refs pending

Local Proof of Algebraic Characterization of Free Actions

Paul F. Baum, Piotr M. Hajac

arxiv:1402.3024 v2 · 2014-02-13 · math.AT · math.QA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GHC4JUSP74BOZ33CX3P7ULZ2LM}

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	2026-05-18T02:50:22.707544Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31c5c4d24fff02ecef62bedffa2f3a5b07921b4afed3fa3bbc6d7e4b222101b9

Aliases

arxiv: 1402.3024 · arxiv_version: 1402.3024v2 · doi: 10.48550/arxiv.1402.3024 · pith_short_12: GHC4JUSP74BO · pith_short_16: GHC4JUSP74BOZ33C · pith_short_8: GHC4JUSP

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/GHC4JUSP74BOZ33CX3P7ULZ2LM \
  | 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: 31c5c4d24fff02ecef62bedffa2f3a5b07921b4afed3fa3bbc6d7e4b222101b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a14df26ae27fe0fea3d7cb760298e0a6e9f3bdd8d1c17286f3ae519699bdf2a0",
    "cross_cats_sorted": [
      "math.QA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2014-02-13T03:19:21Z",
    "title_canon_sha256": "a0c2836fa1228d09dc24769f0991177a9cac46a5fe3640cf7dafad7d22831b6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.3024",
    "kind": "arxiv",
    "version": 2
  }
}