Pith Number

pith:SBZP4XKM

pith:2018:SBZP4XKMMSNR6XTMXSPZLXEO5H

not attested not anchored not stored refs pending

Building the Space Elevator: Lessons from Biological Design

Dan M. Popescu, Sean X. Sun

arxiv:1804.06453 v1 · 2018-04-17 · physics.space-ph · physics.app-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{SBZP4XKMMSNR6XTMXSPZLXEO5H}

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	2026-05-18T00:18:06.634090Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9072fe5d4c649b1f5e6cbc9f95dc8ee9cd1534fd1a5e7c0b872e6d2a07b4a97e

Aliases

arxiv: 1804.06453 · arxiv_version: 1804.06453v1 · doi: 10.48550/arxiv.1804.06453 · pith_short_12: SBZP4XKMMSNR · pith_short_16: SBZP4XKMMSNR6XTM · pith_short_8: SBZP4XKM

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/SBZP4XKMMSNR6XTMXSPZLXEO5H \
  | 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: 9072fe5d4c649b1f5e6cbc9f95dc8ee9cd1534fd1a5e7c0b872e6d2a07b4a97e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4027d4527ad756852745e966390da6fd091bf3d82b058e17520da30c68534a1e",
    "cross_cats_sorted": [
      "physics.app-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.space-ph",
    "submitted_at": "2018-04-17T19:42:51Z",
    "title_canon_sha256": "7420de785cd4f94bff1b93dd14e82af6ef03841a16492951fb57b60b69f7a4b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.06453",
    "kind": "arxiv",
    "version": 1
  }
}