Pith Number

pith:JQJBB3Q4

pith:2018:JQJBB3Q4YZQ5WYMZYIVIDQP2BQ

not attested not anchored not stored refs pending

A stable flat universe with variable Cosmological constant in f(R,T) Gravity

Nasr Ahmed, Sultan Z. Alamri

arxiv:1802.09520 v4 · 2018-02-26 · 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{JQJBB3Q4YZQ5WYMZYIVIDQP2BQ}

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	2026-05-18T00:03:06.653332Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c1210ee1cc661db6199c22a81c1fa0c2d591da015c0b81b3a8465892d74a3f1

Aliases

arxiv: 1802.09520 · arxiv_version: 1802.09520v4 · doi: 10.48550/arxiv.1802.09520 · pith_short_12: JQJBB3Q4YZQ5 · pith_short_16: JQJBB3Q4YZQ5WYMZ · pith_short_8: JQJBB3Q4

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/JQJBB3Q4YZQ5WYMZYIVIDQP2BQ \
  | 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: 4c1210ee1cc661db6199c22a81c1fa0c2d591da015c0b81b3a8465892d74a3f1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "549c42c90fb226b9961f08ecd31754f640d2599e99d0431c39abf7399eaecded",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-02-26T11:46:06Z",
    "title_canon_sha256": "1ab9c1f3200e668d4ad38052e8cff89c239f0fbb57c4eb93b12f8e28cf23cccb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.09520",
    "kind": "arxiv",
    "version": 4
  }
}