Pith Number

pith:RC2YQYP5

pith:2014:RC2YQYP55PXB2VRQ6DIXKPJA3J

not attested not anchored not stored refs pending

Friendly Artificial Intelligence: the Physics Challenge

Max Tegmark (MIT)

arxiv:1409.0813 v2 · 2014-09-02 · cs.CY · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RC2YQYP55PXB2VRQ6DIXKPJA3J}

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	2026-05-18T01:20:59.402169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88b58861fdebee1d5630f0d1753d20da5b2820c936453f9ca69134f705943d12

Aliases

arxiv: 1409.0813 · arxiv_version: 1409.0813v2 · doi: 10.48550/arxiv.1409.0813 · pith_short_12: RC2YQYP55PXB · pith_short_16: RC2YQYP55PXB2VRQ · pith_short_8: RC2YQYP5

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/RC2YQYP55PXB2VRQ6DIXKPJA3J \
  | 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: 88b58861fdebee1d5630f0d1753d20da5b2820c936453f9ca69134f705943d12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50b3a4853a98d688b25aa79d767abdf0b51db27b756613be1917b1ba8d9c32b3",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2014-09-02T18:20:28Z",
    "title_canon_sha256": "46b4a8f7c35b5b919a7c208ffaf35bf80c00440f2b6c8dba8f373a46f7f214be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.0813",
    "kind": "arxiv",
    "version": 2
  }
}