Pith Number

pith:77LT4SGG

pith:2010:77LT4SGGIXHHQKPZ5RNDFEPLVR

not attested not anchored not stored refs pending

Supersonic Downflows at the Umbra-Penumbra Boundary of Sunspots

Luis R. Bellot Rubio, P. Venkatakrishnan, Rohan E. Louis, Shibu K. Mathew

arxiv:1010.0519 v2 · 2010-10-04 · 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{77LT4SGGIXHHQKPZ5RNDFEPLVR}

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	2026-05-18T02:05:12.015592Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ffd73e48c645ce7829f9ec5a3291ebac5307860873e51ddd39289797d77cc024

Aliases

arxiv: 1010.0519 · arxiv_version: 1010.0519v2 · doi: 10.48550/arxiv.1010.0519 · pith_short_12: 77LT4SGGIXHH · pith_short_16: 77LT4SGGIXHHQKPZ · pith_short_8: 77LT4SGG

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/77LT4SGGIXHHQKPZ5RNDFEPLVR \
  | 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: ffd73e48c645ce7829f9ec5a3291ebac5307860873e51ddd39289797d77cc024

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72c8f0e31eceb7b0f5c7fd2a8a603578bc557e32974540d6811531c810a585f5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-10-04T09:46:58Z",
    "title_canon_sha256": "1455f5697a7fa1666107c7c3d152cfbf82d20b3f140b070e020ed2a8077ae7bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1010.0519",
    "kind": "arxiv",
    "version": 2
  }
}