Pith Number

pith:SDWY4HPW

pith:2018:SDWY4HPWAA2U7WYFH5SFF5XLOY

not attested not anchored not stored refs pending

Sector models - A toolkit for teaching general relativity: III. Spacetime geodesics

Corvin Zahn, Ute Kraus

arxiv:1804.09765 v1 · 2018-04-25 · physics.ed-ph · gr-qc

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SDWY4HPWAA2U7WYFH5SFF5XLOY}

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	2026-05-17T23:59:17.281408Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90ed8e1df600354fdb053f6452f6eb763877a9edf2792f5ae0cc7dba117d797d

Aliases

arxiv: 1804.09765 · arxiv_version: 1804.09765v1 · doi: 10.48550/arxiv.1804.09765 · pith_short_12: SDWY4HPWAA2U · pith_short_16: SDWY4HPWAA2U7WYF · pith_short_8: SDWY4HPW

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/SDWY4HPWAA2U7WYFH5SFF5XLOY \
  | 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: 90ed8e1df600354fdb053f6452f6eb763877a9edf2792f5ae0cc7dba117d797d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89cba11f2f2dd7f7a05194eb7a12d63dea16444eb90c97a1ac2191d42d870969",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2018-04-25T19:26:13Z",
    "title_canon_sha256": "ab753a60f68120725e5bb93d09481aa20f871b0939877308ca3d92122996c3fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09765",
    "kind": "arxiv",
    "version": 1
  }
}