Pith Number

pith:T6WZ3YNS

pith:1994:T6WZ3YNSF5JW7C3D4HLN52UFBK

not attested not anchored not stored refs pending

The Geometry of classical change of signature

G.F.R.Ellis, M.Carfora

arxiv:gr-qc/9406043 v1 · 1994-06-23 · 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{T6WZ3YNSF5JW7C3D4HLN52UFBK}

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	2026-05-18T02:37:29.849473Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fad9de1b22f536f8b63e1d6deea850a869fa243ca434e0a95e2b3a5853559a3

Aliases

arxiv: gr-qc/9406043 · arxiv_version: gr-qc/9406043v1 · doi: 10.48550/arxiv.gr-qc/9406043 · pith_short_12: T6WZ3YNSF5JW · pith_short_16: T6WZ3YNSF5JW7C3D · pith_short_8: T6WZ3YNS

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/T6WZ3YNSF5JW7C3D4HLN52UFBK \
  | 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: 9fad9de1b22f536f8b63e1d6deea850a869fa243ca434e0a95e2b3a5853559a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c81deb24094b02d1af0b9b5d5deef7a3c09e7d02b963a64b7ff44cacea0e687f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1994-06-23T14:29:28Z",
    "title_canon_sha256": "4734506848f0ccef1fe3956504f3587c46b17aec72b9f4178c9a7cddc615efcd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9406043",
    "kind": "arxiv",
    "version": 1
  }
}