Pith Number

pith:ORDDSAG5

pith:2025:ORDDSAG5Z2UBUXDL4ZRDBH3DH7

not attested not anchored not stored refs pending

Bo\v{s}kovi\'{c}'s Spherical Trigonometric Solution for Determining the Axis and Rate of Solar Rotation by Observing Sunspots in 1777

Damir Hr\v{z}ina, Davor Krajnovi\'c, Domagoj Ru\v{z}djak, Dragan Ro\v{s}a, Dragan \v{S}poljari\'c, Ivica Skoki\'c, Mirko Husak, Roman Braj\v{s}a

arxiv:2507.20383 v1 · 2025-07-27 · 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{ORDDSAG5Z2UBUXDL4ZRDBH3DH7}

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	2026-07-05T11:44:18.337510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74463900ddcea81a5c6be662309f633fc3881e078dcfa392e5d029ee91455f6e

Aliases

arxiv: 2507.20383 · arxiv_version: 2507.20383v1 · doi: 10.48550/arxiv.2507.20383 · pith_short_12: ORDDSAG5Z2UB · pith_short_16: ORDDSAG5Z2UBUXDL · pith_short_8: ORDDSAG5

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/ORDDSAG5Z2UBUXDL4ZRDBH3DH7 \
  | 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: 74463900ddcea81a5c6be662309f633fc3881e078dcfa392e5d029ee91455f6e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3440816b056e83c08297f032023e1276a7d1a6f688f6e25be3e33df8e07270ce",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2025-07-27T18:52:33Z",
    "title_canon_sha256": "61c0d4147afff7870c1cbae35c3eb73a9fb64cc37cf99249661249697b229700"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.20383",
    "kind": "arxiv",
    "version": 1
  }
}