Pith Number

pith:7OKEVAX4

pith:2009:7OKEVAX4KWID4ATHHEI5CDMQXK

not attested not anchored not stored refs pending

Prediction, Retrodiction, and The Amount of Information Stored in the Present

Christopher J. Ellison, James P. Crutchfield, John R. Mahoney

arxiv:0905.3587 v1 · 2009-05-22 · cond-mat.stat-mech · cond-mat.dis-nn · cs.IT · math.IT · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7OKEVAX4KWID4ATHHEI5CDMQXK}

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	2026-05-18T02:13:38.106885Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb944a82fc55903e02673911d10d90baa2a80953d3d6869c80dd571c25cac86f

Aliases

arxiv: 0905.3587 · arxiv_version: 0905.3587v1 · doi: 10.48550/arxiv.0905.3587 · pith_short_12: 7OKEVAX4KWID · pith_short_16: 7OKEVAX4KWID4ATH · pith_short_8: 7OKEVAX4

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/7OKEVAX4KWID4ATHHEI5CDMQXK \
  | 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: fb944a82fc55903e02673911d10d90baa2a80953d3d6869c80dd571c25cac86f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95e5b0d063fb9cef18dfc27a6bab65330f73800d324073122261fb3da579245a",
    "cross_cats_sorted": [
      "cond-mat.dis-nn",
      "cs.IT",
      "math.IT",
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.stat-mech",
    "submitted_at": "2009-05-22T00:57:21Z",
    "title_canon_sha256": "e02d6a4d3f695beb5cb27a0ce14ffedbeaf3431c3f9b959d63f26a65eabe9fb9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.3587",
    "kind": "arxiv",
    "version": 1
  }
}