Pith Number

pith:NFB4IPLK

pith:2009:NFB4IPLK2IKRKZHAE3YUVDG4J5

not attested not anchored not stored refs pending

The Acceleration of the Expansion of the Universe: A Brief Early History of the Supernova Cosmology Project (SCP)

Gerson Goldhaber

arxiv:0907.3526 v1 · 2009-07-21 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NFB4IPLK2IKRKZHAE3YUVDG4J5}

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	2026-05-18T02:12:55.272239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6943c43d6ad2151564e026f14a8cdc4f5f16340353e3d500c300fe0749eb74dc

Aliases

arxiv: 0907.3526 · arxiv_version: 0907.3526v1 · doi: 10.48550/arxiv.0907.3526 · pith_short_12: NFB4IPLK2IKR · pith_short_16: NFB4IPLK2IKRKZHA · pith_short_8: NFB4IPLK

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/NFB4IPLK2IKRKZHAE3YUVDG4J5 \
  | 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: 6943c43d6ad2151564e026f14a8cdc4f5f16340353e3d500c300fe0749eb74dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6657b01fb678d2b61250a07c241dfa57bf6b4f398bca96036ff4de3a6b13b544",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-21T02:32:45Z",
    "title_canon_sha256": "0802d98412907aac90c764898488f89a88093b381f39a728b68668c80a8d0e11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3526",
    "kind": "arxiv",
    "version": 1
  }
}