Pith Number

pith:XPI4EUIB

pith:2017:XPI4EUIBZAG3KHQ35NIRXLCHWH

not attested not anchored not stored refs pending

Reconstructing f(R) Gravity from a Chaplygin Scalar Field in de Sitter Spacetimes

Amare Abebe, Heba Sami, Joseph Ntahompagaze, Maye Elmardi, Neo Namane

arxiv:1706.07790 v2 · 2017-06-23 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XPI4EUIBZAG3KHQ35NIRXLCHWH}

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	2026-05-18T00:23:35.480358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbd1c25101c80db51e1beb511bac47b1ccc909ff51b8a4c0b8329244b75b835e

Aliases

arxiv: 1706.07790 · arxiv_version: 1706.07790v2 · doi: 10.48550/arxiv.1706.07790 · pith_short_12: XPI4EUIBZAG3 · pith_short_16: XPI4EUIBZAG3KHQ3 · pith_short_8: XPI4EUIB

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/XPI4EUIBZAG3KHQ35NIRXLCHWH \
  | 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: bbd1c25101c80db51e1beb511bac47b1ccc909ff51b8a4c0b8329244b75b835e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4d3db1cc8403d7b69dbe6fbe51c8afb08618876e42d44f4c8277ada546ef39d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2017-06-23T17:53:44Z",
    "title_canon_sha256": "ff72f9ab65075afcf1447ded4e806ef9ea7d8b59e7751898152d980cfe15af6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.07790",
    "kind": "arxiv",
    "version": 2
  }
}