Pith Number

pith:IGD4ZUV3

pith:2001:IGD4ZUV3LTGNUL4K46NJGDKC4G

not attested not anchored not stored refs pending

Hubble's Nobel Prize

Domingos Soares

arxiv:astro-ph/0103069 v2 · 2001-03-05 · 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{IGD4ZUV3LTGNUL4K46NJGDKC4G}

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	2026-05-18T04:18:24.018842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4187ccd2bb5cccda2f8ae79a930d42e1b105260d2e7390a8897c740660346cab

Aliases

arxiv: astro-ph/0103069 · arxiv_version: astro-ph/0103069v2 · doi: 10.48550/arxiv.astro-ph/0103069 · pith_short_12: IGD4ZUV3LTGN · pith_short_16: IGD4ZUV3LTGNUL4K · pith_short_8: IGD4ZUV3

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/IGD4ZUV3LTGNUL4K46NJGDKC4G \
  | 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: 4187ccd2bb5cccda2f8ae79a930d42e1b105260d2e7390a8897c740660346cab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "27191784b498b782fdf1073e81253a58c4b2a3082bf02822343a1203fe9da89d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-03-05T12:01:10Z",
    "title_canon_sha256": "8a26e16ea68c74ca2547d1a6d44c5a2052247e7b16ed7072c512b8e848ff656d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0103069",
    "kind": "arxiv",
    "version": 2
  }
}