Pith Number

pith:KXYQ5MFW

pith:2020:KXYQ5MFWQIQ5BSRTMGJI4IUFE5

not attested not anchored not stored refs pending

Solar One: A Proposal for The First Crewed Interstellar Spacecraft

Alberto Caballero

arxiv:2007.11474 v2 · 2020-07-20 · physics.pop-ph · 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{KXYQ5MFWQIQ5BSRTMGJI4IUFE5}

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	2026-07-05T01:58:21.340698Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55f10eb0b68221d0ca3361928e2285276fc3c74c7e25568c1a09833047437430

Aliases

arxiv: 2007.11474 · arxiv_version: 2007.11474v2 · doi: 10.48550/arxiv.2007.11474 · pith_short_12: KXYQ5MFWQIQ5 · pith_short_16: KXYQ5MFWQIQ5BSRT · pith_short_8: KXYQ5MFW

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/KXYQ5MFWQIQ5BSRTMGJI4IUFE5 \
  | 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: 55f10eb0b68221d0ca3361928e2285276fc3c74c7e25568c1a09833047437430

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5cf03900bb5b88363e5ea46c6efcde1cce983672e86da7749d98ffb528e678b",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2020-07-20T15:08:58Z",
    "title_canon_sha256": "655bc339ae4f51072e6b44661c8829d1fd7ffbfd23432506f96dddc3273c5393"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.11474",
    "kind": "arxiv",
    "version": 2
  }
}