Pith Number

pith:DDS75JBZ

pith:2010:DDS75JBZL3LNHQ4HE6DJTC2WIA

not attested not anchored not stored refs pending

A Sea Change in Eta Carinae

Andrea Mehner, Gary J. Ferland, John C. Martin, Kazunori Ishibashi, Kris Davidson, Nolan R. Walborn, Roberta M. Humphreys

arxiv:1004.3529 v3 · 2010-04-20 · 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{DDS75JBZL3LNHQ4HE6DJTC2WIA}

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	2026-05-18T02:07:56.067800Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18e5fea4395ed6d3c3872786998b56403271b3ed9069d10635ba81e04cf6508a

Aliases

arxiv: 1004.3529 · arxiv_version: 1004.3529v3 · doi: 10.48550/arxiv.1004.3529 · pith_short_12: DDS75JBZL3LN · pith_short_16: DDS75JBZL3LNHQ4H · pith_short_8: DDS75JBZ

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/DDS75JBZL3LNHQ4HE6DJTC2WIA \
  | 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: 18e5fea4395ed6d3c3872786998b56403271b3ed9069d10635ba81e04cf6508a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24e8121bb41b5b2fcc557418be933b754ff7123829185158d24fd4b4950195d1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-04-20T18:55:36Z",
    "title_canon_sha256": "abbe9632235d0c5073055bef2723e1f381987b32b67ad8f111ec890a04beaf00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.3529",
    "kind": "arxiv",
    "version": 3
  }
}