Pith Number

pith:4KEPNEHW

pith:2015:4KEPNEHWMVMQYPJTTNNNMCT3GB

not attested not anchored not stored refs pending

The Temporal Logic of two dimensional Minkowski spacetime is decidable

Mark Reynolds, Robin Hirsch

arxiv:1507.04903 v6 · 2015-07-17 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4KEPNEHWMVMQYPJTTNNNMCT3GB}

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	2026-05-18T00:42:35.434277Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e288f690f665590c3d339b5ad60a7b306b02e7d838596193a366bcc5c1dffa80

Aliases

arxiv: 1507.04903 · arxiv_version: 1507.04903v6 · doi: 10.48550/arxiv.1507.04903 · pith_short_12: 4KEPNEHWMVMQ · pith_short_16: 4KEPNEHWMVMQYPJT · pith_short_8: 4KEPNEHW

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/4KEPNEHWMVMQYPJTTNNNMCT3GB \
  | 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: e288f690f665590c3d339b5ad60a7b306b02e7d838596193a366bcc5c1dffa80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3deeeb3feb4cce36b30528e01bda95bee75c3b7d2587bc66954293bb0dddd4f3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-07-17T10:13:28Z",
    "title_canon_sha256": "7787b88c5fb958ec9b0d7a8e96abe832ef4cb0f3db79f5b9c0914343b0ed7a50"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04903",
    "kind": "arxiv",
    "version": 6
  }
}