Pith Number

pith:HGFJ4XDS

pith:2013:HGFJ4XDSZYUWCEPMRKMHCZTMPW

not attested not anchored not stored refs pending

Formality of certain CW complexes

Parameswaran Sankaran, Prateep Chakraborty

arxiv:1301.5421 v3 · 2013-01-23 · 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{HGFJ4XDSZYUWCEPMRKMHCZTMPW}

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	2026-05-18T00:07:51.440124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

398a9e5c72ce296111ec8a9871666c7d93c9bc9f006998d299dcbd22c98509a3

Aliases

arxiv: 1301.5421 · arxiv_version: 1301.5421v3 · doi: 10.48550/arxiv.1301.5421 · pith_short_12: HGFJ4XDSZYUW · pith_short_16: HGFJ4XDSZYUWCEPM · pith_short_8: HGFJ4XDS

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/HGFJ4XDSZYUWCEPMRKMHCZTMPW \
  | 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: 398a9e5c72ce296111ec8a9871666c7d93c9bc9f006998d299dcbd22c98509a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b7d0dc081119e379317f1f4cbc11d40f4b8f017ff32e89cbcb8beef6971b2c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-01-23T07:43:13Z",
    "title_canon_sha256": "0bee28fc28821901ae956507adbd3667c907f60fcf4dd1f043f009868d0b65f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5421",
    "kind": "arxiv",
    "version": 3
  }
}