Pith Number

pith:TKHYJFKQ

pith:2018:TKHYJFKQWDVN6HCWBWQJ56S2VL

not attested not anchored not stored refs pending

The magnetic nature of umbra-penumbra boundary in sunspots

Jan Jur\v{c}\'ak, Ji\v{r}\'i Vomlel, Nazaret Bello Gonz\'alez, Reza Rezaei, Rolf Schlichenmaier

arxiv:1801.08983 v1 · 2018-01-26 · 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{TKHYJFKQWDVN6HCWBWQJ56S2VL}

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	2026-05-18T00:20:02.473759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a8f849550b0eadf1c560da09efa5aaad951f63c6e726534a75853eddc5453b1

Aliases

arxiv: 1801.08983 · arxiv_version: 1801.08983v1 · doi: 10.48550/arxiv.1801.08983 · pith_short_12: TKHYJFKQWDVN · pith_short_16: TKHYJFKQWDVN6HCW · pith_short_8: TKHYJFKQ

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/TKHYJFKQWDVN6HCWBWQJ56S2VL \
  | 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: 9a8f849550b0eadf1c560da09efa5aaad951f63c6e726534a75853eddc5453b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "16a848c887a6a766f1368756e2476323ddee4e01e26ce6cb3375f095e1da2964",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-01-26T21:34:35Z",
    "title_canon_sha256": "654b8cc374f799f0079d53c4dc35e821dba5fbf0fe75554f42b0a2bc1ce94276"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.08983",
    "kind": "arxiv",
    "version": 1
  }
}