Pith Number

pith:RSYF72HS

pith:2009:RSYF72HSZJMH7N4NKIO7Z53HQJ

not attested not anchored not stored refs pending

Non-canonical isomorphisms

Stephen Lack

arxiv:0912.2126 v1 · 2009-12-10 · 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{RSYF72HSZJMH7N4NKIO7Z53HQJ}

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	2026-05-18T03:56:35.508227Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8cb05fe8f2ca587fb78d521dfcf767824134f8bd807b39932666c7c555eb62de

Aliases

arxiv: 0912.2126 · arxiv_version: 0912.2126v1 · doi: 10.48550/arxiv.0912.2126 · pith_short_12: RSYF72HSZJMH · pith_short_16: RSYF72HSZJMH7N4N · pith_short_8: RSYF72HS

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/RSYF72HSZJMH7N4NKIO7Z53HQJ \
  | 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: 8cb05fe8f2ca587fb78d521dfcf767824134f8bd807b39932666c7c555eb62de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4876b780cfce0f89d925bef311ba5d1fe0bf421c8d1c295b125755073f0eacb2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2009-12-10T23:20:42Z",
    "title_canon_sha256": "dcb9a0404442ef16b72da00c77778f4e3e7101203d9986108a02c95eeaa859a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2126",
    "kind": "arxiv",
    "version": 1
  }
}