Pith Number

pith:CL44JMV5

pith:2013:CL44JMV5ABQNRTPYAGVFMUTSKU

not attested not anchored not stored refs pending

A holographic bound on the total number of computations in the visible Universe

Maurice H.P.M. van Putten

arxiv:1302.3470 v3 · 2013-02-14 · 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{CL44JMV5ABQNRTPYAGVFMUTSKU}

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	2026-05-18T01:51:41.223062Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

12f9c4b2bd0060d8cdf801aa565272552d3fcb4c004e310a16dfee795e8383a2

Aliases

arxiv: 1302.3470 · arxiv_version: 1302.3470v3 · doi: 10.48550/arxiv.1302.3470 · pith_short_12: CL44JMV5ABQN · pith_short_16: CL44JMV5ABQNRTPY · pith_short_8: CL44JMV5

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/CL44JMV5ABQNRTPYAGVFMUTSKU \
  | 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: 12f9c4b2bd0060d8cdf801aa565272552d3fcb4c004e310a16dfee795e8383a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2df6e089a7cfe6e61232bbf36bb745c04b0e1d83c73e4d03b1e1a7c776ddcf78",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2013-02-14T16:58:43Z",
    "title_canon_sha256": "e77c225db3c101d4981fb7e391ccc7a0ec5d709cb2dca8f4c82c5729592b567b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.3470",
    "kind": "arxiv",
    "version": 3
  }
}