Pith Number

pith:WYX7N22U

pith:2017:WYX7N22UDVGSVQNUC5QBPHQ4Y4

not attested not anchored not stored refs pending

Astronomical technology - the past and the future

Immo Appenzeller

arxiv:1702.08018 v1 · 2017-02-26 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WYX7N22UDVGSVQNUC5QBPHQ4Y4}

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	2026-05-18T00:49:56.267573Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b62ff6eb541d4d2ac1b41760179e1cc726df267270c16bbfdd82f361caf09b0d

Aliases

arxiv: 1702.08018 · arxiv_version: 1702.08018v1 · doi: 10.48550/arxiv.1702.08018 · pith_short_12: WYX7N22UDVGS · pith_short_16: WYX7N22UDVGSVQNU · pith_short_8: WYX7N22U

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/WYX7N22UDVGSVQNUC5QBPHQ4Y4 \
  | 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: b62ff6eb541d4d2ac1b41760179e1cc726df267270c16bbfdd82f361caf09b0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf2778540de89359eeae0ee3d5f5dc8e2b417e4824367656f8a64240d78a3473",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2017-02-26T10:35:41Z",
    "title_canon_sha256": "b0910a165cec3e4237a69a1a1ae823c1bcc2beff5550e46cbae8213d684580a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.08018",
    "kind": "arxiv",
    "version": 1
  }
}