Pith Number

pith:5XO4OT43

pith:2022:5XO4OT436GLEOBS4C4ATDVPBWR

not attested not anchored not stored refs pending

Constraining a possible time-variation of the speed of light along with the fine-structure constant using strong gravitational lensing and Type Ia supernovae observations

G. L. F. Santos, J. E. Gonzalez, J. Spinelly, L. R. Cola\c{c}o, S. J. Landau

arxiv:2204.06459 v2 · 2022-04-13 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5XO4OT436GLEOBS4C4ATDVPBWR}

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	2026-07-05T04:51:40.867252Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edddc74f9bf19647065c170131d5e1b45a48a794258ddfdbad7cf6a8af4bad2d

Aliases

arxiv: 2204.06459 · arxiv_version: 2204.06459v2 · doi: 10.48550/arxiv.2204.06459 · pith_short_12: 5XO4OT436GLE · pith_short_16: 5XO4OT436GLEOBS4 · pith_short_8: 5XO4OT43

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/5XO4OT436GLEOBS4C4ATDVPBWR \
  | 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: edddc74f9bf19647065c170131d5e1b45a48a794258ddfdbad7cf6a8af4bad2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a038686ce1709f447b4f2695661bd34c094fddaef2448759617ed39eb9b41b72",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2022-04-13T15:30:15Z",
    "title_canon_sha256": "d22bd15425f890b304b993460da535ecd3e147be0fed23b1d47e699150cd734c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.06459",
    "kind": "arxiv",
    "version": 2
  }
}