Pith Number

pith:AB2LQ7JE

pith:2010:AB2LQ7JEZUQFOZI5UL7HIVFUNF

not attested not anchored not stored refs pending

Dark Before Light: Testing the Cosmic Expansion History through the Cosmic Microwave Background

Eric V. Linder, Tristan L. Smith

arxiv:1009.3500 v1 · 2010-09-17 · 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{AB2LQ7JEZUQFOZI5UL7HIVFUNF}

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	2026-05-18T03:48:34.445064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0074b87d24cd2057651da2fe7454b46969cd51d70965051a167a39439d4d00e7

Aliases

arxiv: 1009.3500 · arxiv_version: 1009.3500v1 · doi: 10.48550/arxiv.1009.3500 · pith_short_12: AB2LQ7JEZUQF · pith_short_16: AB2LQ7JEZUQFOZI5 · pith_short_8: AB2LQ7JE

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/AB2LQ7JEZUQFOZI5UL7HIVFUNF \
  | 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: 0074b87d24cd2057651da2fe7454b46969cd51d70965051a167a39439d4d00e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed864026cc9759ee30d9523f2f7d6ae59e7774bb474215e94a82e335e620fe86",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-09-17T20:04:08Z",
    "title_canon_sha256": "61094025018166cb936f627791c601fc3ec13082e1e12ae79c81f880bdc89237"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.3500",
    "kind": "arxiv",
    "version": 1
  }
}