Pith Number

pith:J5MGNRUF

pith:2019:J5MGNRUFKMLESRFKDWIDJFNCNF

not attested not anchored not stored refs pending

A Cyclic Universe With Varying Cosmological Constant in $f(R,T)$ gravity

Nasr Ahmed, Sultan Z. Alamri

arxiv:1902.03104 v1 · 2019-02-06 · 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{J5MGNRUFKMLESRFKDWIDJFNCNF}

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	2026-05-17T23:54:27.966407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f5866c68553164944aa1d903495a2695700417c94003b1399d8792e96ca2379

Aliases

arxiv: 1902.03104 · arxiv_version: 1902.03104v1 · doi: 10.48550/arxiv.1902.03104 · pith_short_12: J5MGNRUFKMLE · pith_short_16: J5MGNRUFKMLESRFK · pith_short_8: J5MGNRUF

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/J5MGNRUFKMLESRFKDWIDJFNCNF \
  | 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: 4f5866c68553164944aa1d903495a2695700417c94003b1399d8792e96ca2379

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5630fa35dcc453acc9ef31ea1e0bdcfb878e16e35e1314dc6e47d8b9f330972",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-02-06T14:57:05Z",
    "title_canon_sha256": "681c8bf90d943cd401caff5b0e8562b4c81a15e362b69f139c7e748d7759f492"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.03104",
    "kind": "arxiv",
    "version": 1
  }
}