Pith Number

pith:URKKKWAV

pith:2009:URKKKWAVUUFZXWD5WS4MDDGRRX

not attested not anchored not stored refs pending

Modified theories of gravity with non-minimal curvature-matter coupling

Miguel Carvalho Sequeira, Orfeu Bertolami

arxiv:0910.3876 v1 · 2009-10-20 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{URKKKWAVUUFZXWD5WS4MDDGRRX}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:34:18.081495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a454a55815a50b9bd87db4b8c18cd18df72815602f73a9aeef73146d9d9bd0af

Aliases

arxiv: 0910.3876 · arxiv_version: 0910.3876v1 · doi: 10.48550/arxiv.0910.3876 · pith_short_12: URKKKWAVUUFZ · pith_short_16: URKKKWAVUUFZXWD5 · pith_short_8: URKKKWAV

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/URKKKWAVUUFZXWD5WS4MDDGRRX \
  | 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: a454a55815a50b9bd87db4b8c18cd18df72815602f73a9aeef73146d9d9bd0af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b6e143735084dd81d859a6e08091f3039c0c402950992cb0286940132e0e437",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-10-20T15:32:05Z",
    "title_canon_sha256": "cdf2fab3a2fd3b720c5227b2284e806a922a6f5b2e969838a51f1d312195b416"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.3876",
    "kind": "arxiv",
    "version": 1
  }
}