Pith Number

pith:YQHK3MMA

pith:2013:YQHK3MMAD7TTR3YY7FHW43ZDI4

not attested not anchored not stored refs pending

The status and future of EUV astronomy

J.B. Holberg, M.A. Barstow, M.P. Kowalski, S.L. Casewell

arxiv:1309.2181 v1 · 2013-09-09 · 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{YQHK3MMAD7TTR3YY7FHW43ZDI4}

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	2026-05-18T01:47:44.247861Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c40eadb1801fe738ef18f94f6e6f234708a8d6d3d294a7adcc3335c4edca6a24

Aliases

arxiv: 1309.2181 · arxiv_version: 1309.2181v1 · doi: 10.48550/arxiv.1309.2181 · pith_short_12: YQHK3MMAD7TT · pith_short_16: YQHK3MMAD7TTR3YY · pith_short_8: YQHK3MMA

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/YQHK3MMAD7TTR3YY7FHW43ZDI4 \
  | 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: c40eadb1801fe738ef18f94f6e6f234708a8d6d3d294a7adcc3335c4edca6a24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2ce66226b1df1f06cca2b0c7ed74f8306b721bb051f66125075eb188002c023",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-09-09T15:01:38Z",
    "title_canon_sha256": "14ad9167bb2fe497bfb305bf23514a25d5dac8a2871a46e9020d6d61523cdee9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.2181",
    "kind": "arxiv",
    "version": 1
  }
}