Pith Number

pith:7T54K7WS

pith:2013:7T54K7WSVQTHYOJTLVOBGAQ5U7

not attested not anchored not stored refs pending

Do You Always Need a Textbook to Teach Astro 101?

Alexander L. Rudolph

arxiv:1311.3635 v2 · 2013-11-14 · physics.ed-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7T54K7WSVQTHYOJTLVOBGAQ5U7}

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	2026-05-18T01:46:30.854736Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fcfbc57ed2ac267c39335d5c13021da7cbe000ec1bc80738c3bd86c0ebc58a72

Aliases

arxiv: 1311.3635 · arxiv_version: 1311.3635v2 · doi: 10.48550/arxiv.1311.3635 · pith_short_12: 7T54K7WSVQTH · pith_short_16: 7T54K7WSVQTHYOJT · pith_short_8: 7T54K7WS

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/7T54K7WSVQTHYOJTLVOBGAQ5U7 \
  | 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: fcfbc57ed2ac267c39335d5c13021da7cbe000ec1bc80738c3bd86c0ebc58a72

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "57364b246f2f4ec6f6ba5fe4ef77732648fc1cf637787eaf3bd91495e72f3914",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2013-11-14T19:44:12Z",
    "title_canon_sha256": "c23257c0fe0156283d9560c04a602fa4e00e6bf653e1bee19a93b551b13c6140"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.3635",
    "kind": "arxiv",
    "version": 2
  }
}