Pith Number

pith:MYTIAUAS

pith:2019:MYTIAUASHJPX7IGVHLE4WZQNLE

not attested not anchored not stored refs pending

Study of Sunspot Penumbra to Umbra Area Ratio using Kodaikanal White-light Digitized Data

Bibhuti Kumar Jha, Dipankar Banerjee, Sudip Mandal

arxiv:1905.06888 v1 · 2019-05-16 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MYTIAUASHJPX7IGVHLE4WZQNLE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:40:55.109284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66268050123a5f7fa0d53ac9cb660d5910e6c01168faa139f3c17a9133c59d22

Aliases

arxiv: 1905.06888 · arxiv_version: 1905.06888v1 · doi: 10.48550/arxiv.1905.06888 · pith_short_12: MYTIAUASHJPX · pith_short_16: MYTIAUASHJPX7IGV · pith_short_8: MYTIAUAS

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/MYTIAUASHJPX7IGVHLE4WZQNLE \
  | 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: 66268050123a5f7fa0d53ac9cb660d5910e6c01168faa139f3c17a9133c59d22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09b5d53b9771a107971e7817cf2a059618ae7fc25bf5ea68d8b897c15f4802b9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-05-16T16:24:48Z",
    "title_canon_sha256": "5cdb12718a1c22b2505f6a2dd9e005e0a863c90e949b8e4e921c2b3bcc595082"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.06888",
    "kind": "arxiv",
    "version": 1
  }
}