Pith Number

pith:EOH4PSN3

pith:2009:EOH4PSN3Q43LDG56WWATXJN4OO

not attested not anchored not stored refs pending

Unified dark energy and dark matter from a scalar field different from quintessence

Andrew R Liddle, Changjun Gao, David Parkinson, Martin Kunz

arxiv:0912.0949 v1 · 2009-12-05 · 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{EOH4PSN3Q43LDG56WWATXJN4OO}

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	2026-05-18T03:23:56.635162Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

238fc7c9bb8736b19bbeb5813ba5bc73b35e7ca1a64073155727974452690e3e

Aliases

arxiv: 0912.0949 · arxiv_version: 0912.0949v1 · doi: 10.48550/arxiv.0912.0949 · pith_short_12: EOH4PSN3Q43L · pith_short_16: EOH4PSN3Q43LDG56 · pith_short_8: EOH4PSN3

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/EOH4PSN3Q43LDG56WWATXJN4OO \
  | 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: 238fc7c9bb8736b19bbeb5813ba5bc73b35e7ca1a64073155727974452690e3e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc1fa5055ae286c0cc03b17c1625b882897ce8a097db9be5f04fdfa03ee70bf5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-05T20:49:58Z",
    "title_canon_sha256": "548fce41e16a6c13b9034c7b088520720156292a6af47c4753894e39038c6e2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0949",
    "kind": "arxiv",
    "version": 1
  }
}