Pith Number

pith:I57XHL5Q

pith:2008:I57XHL5QRJQ2IRS7BMLBDCXQW6

not attested not anchored not stored refs pending

Evolution of Gas in Galaxies

Lister Staveley-Smith

arxiv:0801.2870 v1 · 2008-01-18 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I57XHL5QRJQ2IRS7BMLBDCXQW6}

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	2026-07-04T15:44:39.438460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

477f73afb08a61a4465f0b16118af0b7a340581cf5e6bc72e9a4e742d5fe9ed8

Aliases

arxiv: 0801.2870 · arxiv_version: 0801.2870v1 · doi: 10.48550/arxiv.0801.2870 · pith_short_12: I57XHL5QRJQ2 · pith_short_16: I57XHL5QRJQ2IRS7 · pith_short_8: I57XHL5Q

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/I57XHL5QRJQ2IRS7BMLBDCXQW6 \
  | 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: 477f73afb08a61a4465f0b16118af0b7a340581cf5e6bc72e9a4e742d5fe9ed8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2da82466c36c000797271860c30af1fbe5261ef68d76aba00a8e513a9e6af444",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-01-18T12:24:24Z",
    "title_canon_sha256": "d7b95673c598ad80f9bc4d29f524146a31b053fc9cbd57959d2a2696ea8f2268"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0801.2870",
    "kind": "arxiv",
    "version": 1
  }
}