Pith Number

pith:OPNAQY53

pith:2012:OPNAQY53KPSRBBL4UEJ2WGOYBP

not attested not anchored not stored refs pending

Ghost dark energy in $f(R)$ model of gravity

Ali.Aghamohammadi, B. Sabet, Kh. Saaidi, O. Farooq

arxiv:1203.4518 v3 · 2012-03-17 · physics.gen-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{OPNAQY53KPSRBBL4UEJ2WGOYBP}

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	2026-05-18T03:01:47.161358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73da0863bb53e510857ca113ab19d80bf88c0488adf56ad4f5d526cecad4d970

Aliases

arxiv: 1203.4518 · arxiv_version: 1203.4518v3 · doi: 10.48550/arxiv.1203.4518 · pith_short_12: OPNAQY53KPSR · pith_short_16: OPNAQY53KPSRBBL4 · pith_short_8: OPNAQY53

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/OPNAQY53KPSRBBL4UEJ2WGOYBP \
  | 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: 73da0863bb53e510857ca113ab19d80bf88c0488adf56ad4f5d526cecad4d970

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73d3a31c895ec3a29efea224ff25a03ea8b6257469547c900a15a4668234c9c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2012-03-17T09:43:10Z",
    "title_canon_sha256": "acbe0ab76b51bdf0530496e24dc70a5306a82ef7345fb310e7d399eed49acc5c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.4518",
    "kind": "arxiv",
    "version": 3
  }
}