Pith Number

pith:T4KFRXR5

pith:2012:T4KFRXR5AYGTIS6ENWU6NKKSYW

not attested not anchored not stored refs pending

The Universe, the Cold War, and Dialectical Materialism

Helge Kragh

arxiv:1204.1625 v2 · 2012-04-07 · 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{T4KFRXR5AYGTIS6ENWU6NKKSYW}

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	2026-05-18T03:57:52.666220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f1458de3d060d344bc46da9e6a952c5982183e01ce6d8c405307d289c05970e

Aliases

arxiv: 1204.1625 · arxiv_version: 1204.1625v2 · doi: 10.48550/arxiv.1204.1625 · pith_short_12: T4KFRXR5AYGT · pith_short_16: T4KFRXR5AYGTIS6E · pith_short_8: T4KFRXR5

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/T4KFRXR5AYGTIS6ENWU6NKKSYW \
  | 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: 9f1458de3d060d344bc46da9e6a952c5982183e01ce6d8c405307d289c05970e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0186849242ec44f4dd8f80c31499e7c1eb73c143b8289d54b298a03a765c9b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2012-04-07T12:21:02Z",
    "title_canon_sha256": "32699e0b2c87b733c55789a3a2da414d1da4176c50d1686933183938df89cb5c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1625",
    "kind": "arxiv",
    "version": 2
  }
}