Pith Number

pith:LRGNYUPM

pith:2016:LRGNYUPMEK6QMC2T6OVK65X7IC

not attested not anchored not stored refs pending

Shifting Milestones of Natural Sciences: The Ancient Egyptian Discovery of Algol's Period Confirmed

Lauri Jetsu, Sebastian Porceddu

arxiv:1601.06990 v1 · 2016-01-26 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LRGNYUPMEK6QMC2T6OVK65X7IC}

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	2026-05-18T01:21:59.377271Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c4cdc51ec22bd060b53f3aaaf76ff408724c5064322908bc50195e6e1ff7734

Aliases

arxiv: 1601.06990 · arxiv_version: 1601.06990v1 · doi: 10.48550/arxiv.1601.06990 · pith_short_12: LRGNYUPMEK6Q · pith_short_16: LRGNYUPMEK6QMC2T · pith_short_8: LRGNYUPM

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/LRGNYUPMEK6QMC2T6OVK65X7IC \
  | 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: 5c4cdc51ec22bd060b53f3aaaf76ff408724c5064322908bc50195e6e1ff7734

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7ff04948965f496dfad9a5a489acd6f0ebc42f23a65b75cfc49b9400a0b5c79",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-01-26T12:12:24Z",
    "title_canon_sha256": "04a013c820dbd074f7864b2a99074180674696f49c6fb7c566830bb0fec79e6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.06990",
    "kind": "arxiv",
    "version": 1
  }
}