Pith Number

pith:BUU2M2PQ

pith:2009:BUU2M2PQQOM3ALJTDO4NYDH46Q

not attested not anchored not stored refs pending

"Light Sail" Acceleration Revisited

Andrea Macchi, Francesco Pegoraro, Silvia Veghini

arxiv:0905.2068 v2 · 2009-05-13 · physics.plasm-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{BUU2M2PQQOM3ALJTDO4NYDH46Q}

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	2026-05-18T04:39:39.271030Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d29a669f08399b02d331bb8dc0cfcf43d0a5b507574f4c1e5ef759d80a141ba

Aliases

arxiv: 0905.2068 · arxiv_version: 0905.2068v2 · doi: 10.48550/arxiv.0905.2068 · pith_short_12: BUU2M2PQQOM3 · pith_short_16: BUU2M2PQQOM3ALJT · pith_short_8: BUU2M2PQ

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/BUU2M2PQQOM3ALJTDO4NYDH46Q \
  | 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: 0d29a669f08399b02d331bb8dc0cfcf43d0a5b507574f4c1e5ef759d80a141ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac00db734715ace9940bc4f156b52e09d046d28c84b0969d6c670d023cd44195",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.plasm-ph",
    "submitted_at": "2009-05-13T11:25:46Z",
    "title_canon_sha256": "3263db39d3791de5d2cffb5c75a56c486b7f480e69368d424fb6fb28cad604cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2068",
    "kind": "arxiv",
    "version": 2
  }
}