Pith Number

pith:WUG2G6E2

pith:2012:WUG2G6E2Q3MHEJGONG4HPOZBAG

not attested not anchored not stored refs pending

Geometry and Astronomy: Pre-Einstein Speculations of Non-Euclidean Space

Helge Kragh

arxiv:1205.4909 v2 · 2012-05-22 · physics.hist-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{WUG2G6E2Q3MHEJGONG4HPOZBAG}

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.

Cited by

1 paper in Pith

Historical and Philosophical Aspects of the Einstein World

Receipt and verification

First computed	2026-05-18T03:53:44.653068Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b50da3789a86d87224ce69b877bb2101b1d8189699aae25415179d57a66a50bd

Aliases

arxiv: 1205.4909 · arxiv_version: 1205.4909v2 · doi: 10.48550/arxiv.1205.4909 · pith_short_12: WUG2G6E2Q3MH · pith_short_16: WUG2G6E2Q3MHEJGO · pith_short_8: WUG2G6E2

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/WUG2G6E2Q3MHEJGONG4HPOZBAG \
  | 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: b50da3789a86d87224ce69b877bb2101b1d8189699aae25415179d57a66a50bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98251811b9e4b3756a286215a2da35fe73815880be8988c283653f7592691882",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2012-05-22T13:22:15Z",
    "title_canon_sha256": "fbc4d3dae456da20820bf299b3fb22248b5e6012318c002ac233ffba076c39a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.4909",
    "kind": "arxiv",
    "version": 2
  }
}