Pith Number

pith:VUV4ENPJ

pith:2019:VUV4ENPJ7TRDMXGYAVFMUAK4K3

not attested not anchored not stored refs pending

Orbital Deflection of Comets by Directed Energy

Gary B. Hughes, Philip M. Lubin, Qicheng Zhang

arxiv:1904.12850 v1 · 2019-04-29 · astro-ph.EP · 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{VUV4ENPJ7TRDMXGYAVFMUAK4K3}

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	2026-05-17T23:47:15.382119Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad2bc235e9fce2365cd8054aca015c56ec19e34fafde1c46d4f719ecb46ced9b

Aliases

arxiv: 1904.12850 · arxiv_version: 1904.12850v1 · doi: 10.48550/arxiv.1904.12850 · pith_short_12: VUV4ENPJ7TRD · pith_short_16: VUV4ENPJ7TRDMXGY · pith_short_8: VUV4ENPJ

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/VUV4ENPJ7TRDMXGYAVFMUAK4K3 \
  | 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: ad2bc235e9fce2365cd8054aca015c56ec19e34fafde1c46d4f719ecb46ced9b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d398195989fee7ba7e568800a852257a16adcaa14c33d672fb8baf88f736fcdd",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-04-29T17:58:06Z",
    "title_canon_sha256": "c90f84cafeff1a397051e1ce68b146fbd0628831a758f862f79a9e0f81ece540"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.12850",
    "kind": "arxiv",
    "version": 1
  }
}