Pith Number

pith:UGTAEEAR

pith:2010:UGTAEEARHVO3BZPHL4LZYMBPX4

not attested not anchored not stored refs pending

Inevitable ghost and the degrees of freedom in f(R,G) gravity

Antonio De Felice, Takahiro Tanaka

arxiv:1006.4399 v2 · 2010-06-23 · astro-ph.CO · gr-qc · hep-ph · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UGTAEEARHVO3BZPHL4LZYMBPX4}

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.

Cited by

1 paper in Pith

DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity

Receipt and verification

First computed	2026-05-18T04:38:40.031037Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1a60210113d5db0e5e75f179c302fbf104f6079f1f18388f8f0d93d0ecb916b

Aliases

arxiv: 1006.4399 · arxiv_version: 1006.4399v2 · doi: 10.48550/arxiv.1006.4399 · pith_short_12: UGTAEEARHVO3 · pith_short_16: UGTAEEARHVO3BZPH · pith_short_8: UGTAEEAR

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/UGTAEEARHVO3BZPHL4LZYMBPX4 \
  | 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: a1a60210113d5db0e5e75f179c302fbf104f6079f1f18388f8f0d93d0ecb916b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72513008a9c052f6fd20e53fd5b90d51cd491b4b35c91f427a0bbaa229ae6429",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-06-23T01:01:08Z",
    "title_canon_sha256": "1352a591d94c70b0e887968236ee4d0933d13ab2b19f91a50f982db448d6fa4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1006.4399",
    "kind": "arxiv",
    "version": 2
  }
}