Pith Number

pith:SPIOCE7C

pith:2009:SPIOCE7C25XRLDKIVUREDIWH6Z

not attested not anchored not stored refs pending

The number of beams in IMRT - theoretical investigations and implications for single-arc IMRT

Thomas Bortfeld

arxiv:0909.3332 v1 · 2009-09-17 · physics.med-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{SPIOCE7C25XRLDKIVUREDIWH6Z}

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	2026-05-18T02:11:46.625830Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93d0e113e2d76f158d48ad2241a2c7f66110215424d952d41435bdc48872fe8b

Aliases

arxiv: 0909.3332 · arxiv_version: 0909.3332v1 · doi: 10.48550/arxiv.0909.3332 · pith_short_12: SPIOCE7C25XR · pith_short_16: SPIOCE7C25XRLDKI · pith_short_8: SPIOCE7C

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/SPIOCE7C25XRLDKIVUREDIWH6Z \
  | 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: 93d0e113e2d76f158d48ad2241a2c7f66110215424d952d41435bdc48872fe8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffb06b00978ea7ebdd55118fa71ea9cce5f71e7e0d3f051017fb20aa355e277d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2009-09-17T22:23:29Z",
    "title_canon_sha256": "b3f4e24175278637f0b0570fbbcb2615cb1b6c9e5dc7a1b6e9adec01cedb7e30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3332",
    "kind": "arxiv",
    "version": 1
  }
}