Pith Number

pith:MXKWN3FO

pith:2019:MXKWN3FOTU3IJPTTNDTZFMYWUN

not attested not anchored not stored refs pending

The Spaceline: a practical space elevator alternative achievable with current technology

Emily Sandford, Zephyr Penoyre

arxiv:1908.09339 v1 · 2019-08-25 · astro-ph.IM · physics.space-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{MXKWN3FOTU3IJPTTNDTZFMYWUN}

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	2026-07-04T23:59:39.246977Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

65d566ecae9d3684be7368e792b316a373e45816a128673fea2cda0ac222970e

Aliases

arxiv: 1908.09339 · arxiv_version: 1908.09339v1 · doi: 10.48550/arxiv.1908.09339 · pith_short_12: MXKWN3FOTU3I · pith_short_16: MXKWN3FOTU3IJPTT · pith_short_8: MXKWN3FO

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/MXKWN3FOTU3IJPTTNDTZFMYWUN \
  | 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: 65d566ecae9d3684be7368e792b316a373e45816a128673fea2cda0ac222970e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3713336b65e6f07bbf9d0844e2c55c99fe2b547b765a921cda3cc4f764155a49",
    "cross_cats_sorted": [
      "physics.space-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-08-25T14:36:37Z",
    "title_canon_sha256": "a1bb0789e4b5dd96677f926ac97917eef5eae5582d7bc3ee423aca4a00ea6d99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.09339",
    "kind": "arxiv",
    "version": 1
  }
}