Pith Number

pith:3UTDRVWC

pith:2015:3UTDRVWCRGJRVGYYWSRWZGVNLR

not attested not anchored not stored refs pending

Derivative of the light frequency shift as a measure of spacetime curvature for gravitational wave detection

Giuseppe Congedo

arxiv:1504.05575 v2 · 2015-04-21 · gr-qc · 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{3UTDRVWCRGJRVGYYWSRWZGVNLR}

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	2026-05-18T02:17:10.817091Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd2638d6c289931a9b18b4a36c9aad5c5d148c95ffe738daf0f59745747d317e

Aliases

arxiv: 1504.05575 · arxiv_version: 1504.05575v2 · doi: 10.48550/arxiv.1504.05575 · pith_short_12: 3UTDRVWCRGJR · pith_short_16: 3UTDRVWCRGJRVGYY · pith_short_8: 3UTDRVWC

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/3UTDRVWCRGJRVGYYWSRWZGVNLR \
  | 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: dd2638d6c289931a9b18b4a36c9aad5c5d148c95ffe738daf0f59745747d317e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1b25b118516925c6ca4b91537c290a2b7ce12436c4c1a3ff2b557f7775b1126",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2015-04-21T19:59:42Z",
    "title_canon_sha256": "e091144c20954605c9ce48e9348e073e963a652a111b89e751978260b54ba631"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05575",
    "kind": "arxiv",
    "version": 2
  }
}