Pith Number

pith:NLHMDEFD

pith:2009:NLHMDEFDENLGNB5B4NNAEJ2UVE

not attested not anchored not stored refs pending

Exotic Smoothness and Astrophysics

Jan Sladkowski

arxiv:0910.2828 v1 · 2009-10-15 · astro-ph.CO · gr-qc · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NLHMDEFDENLGNB5B4NNAEJ2UVE}

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	2026-05-18T02:34:18.734632Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6acec190a323566687a1e35a022754a90ea32132c132847171ba15735a38626e

Aliases

arxiv: 0910.2828 · arxiv_version: 0910.2828v1 · doi: 10.48550/arxiv.0910.2828 · pith_short_12: NLHMDEFDENLG · pith_short_16: NLHMDEFDENLGNB5B · pith_short_8: NLHMDEFD

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/NLHMDEFDENLGNB5B4NNAEJ2UVE \
  | 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: 6acec190a323566687a1e35a022754a90ea32132c132847171ba15735a38626e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "261ba428166b6469d48ea9709c98f6d8eb8c70fa3127829727c2e8c358c4b834",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-15T10:00:12Z",
    "title_canon_sha256": "55e3dd20ff93d9720951f31d98e0adbd201ee04868b7709d38d2f334acb8915f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.2828",
    "kind": "arxiv",
    "version": 1
  }
}