Pith Number

pith:SGUE77D5

pith:2022:SGUE77D5ALWZ3ZQNPROATBA4AR

not attested not anchored not stored refs pending

Scale Transfer in 1849 : Heinrich Schwabe to Rudolf Wolf

Frederic Clette, Hisashi Hayakawa, Laure Lefevre, Maarten Jansen, Shreya Bhattacharya

arxiv:2210.03362 v1 · 2022-10-07 · 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{SGUE77D5ALWZ3ZQNPROATBA4AR}

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	2026-07-05T05:37:42.805900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

91a84ffc7d02ed9de60d7c5c09841c045b3691f35924a11b5380c864b55f02fb

Aliases

arxiv: 2210.03362 · arxiv_version: 2210.03362v1 · doi: 10.48550/arxiv.2210.03362 · pith_short_12: SGUE77D5ALWZ · pith_short_16: SGUE77D5ALWZ3ZQN · pith_short_8: SGUE77D5

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/SGUE77D5ALWZ3ZQNPROATBA4AR \
  | 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: 91a84ffc7d02ed9de60d7c5c09841c045b3691f35924a11b5380c864b55f02fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd073b7d1762f77fec0713dcc9ce4b10597ae7f54afaa790f4141d44bae5d28e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2022-10-07T07:12:14Z",
    "title_canon_sha256": "699af88c849664a08f8f06c6672a046868560090c14a61b8af168b5e7a09d3d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2210.03362",
    "kind": "arxiv",
    "version": 1
  }
}