Pith Number

pith:TKIA6K32

pith:2009:TKIA6K3257WYWRO23WPAB42YUK

not attested not anchored not stored refs pending

Limits on Spacetime Foam

David J. E. Floyd, Eric S. Perlman, Wayne A. Christiansen, Y. Jack Ng

arxiv:0912.0535 v3 · 2009-12-02 · astro-ph.CO · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TKIA6K3257WYWRO23WPAB42YUK}

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	2026-05-18T04:23:46.580395Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a900f2b7aefed8b45dadd9e00f358a2bfd12206cdc83e27d11b79bdd159684d

Aliases

arxiv: 0912.0535 · arxiv_version: 0912.0535v3 · doi: 10.48550/arxiv.0912.0535 · pith_short_12: TKIA6K3257WY · pith_short_16: TKIA6K3257WYWRO2 · pith_short_8: TKIA6K32

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/TKIA6K3257WYWRO23WPAB42YUK \
  | 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: 9a900f2b7aefed8b45dadd9e00f358a2bfd12206cdc83e27d11b79bdd159684d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d9ab36bff4e48c1ea94f6b8de87d7835fe4b278ffa79456e1dc212731f20ac5",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-02T21:55:40Z",
    "title_canon_sha256": "d8ca18bd51bcf6e635abb685f4da6a988d70c8f7ef44071f772c75618a97d5cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0535",
    "kind": "arxiv",
    "version": 3
  }
}