Pith Number

pith:HQXNS3TX

pith:2012:HQXNS3TXGL5X4ZZLRHJOZX2XDB

not attested not anchored not stored refs pending

Beamed Core Antimatter Propulsion: Engine Design and Optimization

Ronan Keane, Wei-Ming Zhang

arxiv:1205.2281 v2 · 2012-01-26 · physics.gen-ph · physics.pop-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{HQXNS3TXGL5X4ZZLRHJOZX2XDB}

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	2026-05-18T03:55:35.082125Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c2ed96e7732fb7e672b89d2ecdf5718758e0e143662f2d0d4e3f029a5f2d5cd

Aliases

arxiv: 1205.2281 · arxiv_version: 1205.2281v2 · doi: 10.48550/arxiv.1205.2281 · pith_short_12: HQXNS3TXGL5X · pith_short_16: HQXNS3TXGL5X4ZZL · pith_short_8: HQXNS3TX

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/HQXNS3TXGL5X4ZZLRHJOZX2XDB \
  | 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: 3c2ed96e7732fb7e672b89d2ecdf5718758e0e143662f2d0d4e3f029a5f2d5cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec968b65f7b48e25d58e19ea2780af55deffbfa56a0ffafe8b36c3b65d4c4d70",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2012-01-26T01:20:02Z",
    "title_canon_sha256": "34822b153cf873d4339cd7bdfd0ebfe2edc24d4682636600e5d7e3b7db84c791"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.2281",
    "kind": "arxiv",
    "version": 2
  }
}