Pith Number

pith:7QDY24PO

pith:2009:7QDY24PO24KP3NKCSZTVILFXNT

not attested not anchored not stored refs pending

Regularity of Cauchy horizons in S2xS1 Gowdy spacetimes

J\"org Hennig, Marcus Ansorg

arxiv:0911.1000 v2 · 2009-11-05 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7QDY24PO24KP3NKCSZTVILFXNT}

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	2026-05-18T04:37:22.224295Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc078d71eed714fdb5429667542cb76cd80371516f7dfa21d9108b4186356f7c

Aliases

arxiv: 0911.1000 · arxiv_version: 0911.1000v2 · doi: 10.48550/arxiv.0911.1000 · pith_short_12: 7QDY24PO24KP · pith_short_16: 7QDY24PO24KP3NKC · pith_short_8: 7QDY24PO

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/7QDY24PO24KP3NKCSZTVILFXNT \
  | 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: fc078d71eed714fdb5429667542cb76cd80371516f7dfa21d9108b4186356f7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "feb3aa058861ae1db90e229413c1c8abdc0c12de18449f151cc5cab1644495b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-11-05T09:48:44Z",
    "title_canon_sha256": "de802222a80636f1bd9341f9da52b931ad831a7a2765b3c58ff5a7954d70733f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1000",
    "kind": "arxiv",
    "version": 2
  }
}