Pith Number

pith:2RPYWZPC

pith:2018:2RPYWZPCC6B7L3KS7GJT4VINTL

not attested not anchored not stored refs pending

Evolving intrinsic motivations for altruistic behavior

Chrisantha Fernando, Edgar A. Duenez-Guzman, Edward Hughes, Jane X. Wang, Joel Z. Leibo, Wojciech M. Czarnecki

arxiv:1811.05931 v2 · 2018-11-14 · cs.MA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2RPYWZPCC6B7L3KS7GJT4VINTL}

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	2026-05-17T23:51:39.147988Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d45f8b65e21783f5ed52f9933e550d9acfb4c92651dfb1bda6afb2de7370018b

Aliases

arxiv: 1811.05931 · arxiv_version: 1811.05931v2 · doi: 10.48550/arxiv.1811.05931 · pith_short_12: 2RPYWZPCC6B7 · pith_short_16: 2RPYWZPCC6B7L3KS · pith_short_8: 2RPYWZPC

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/2RPYWZPCC6B7L3KS7GJT4VINTL \
  | 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: d45f8b65e21783f5ed52f9933e550d9acfb4c92651dfb1bda6afb2de7370018b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "755170d13806f2bb0782d726d4e537bc667f7731f8f6acd5270bab1ac1783557",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MA",
    "submitted_at": "2018-11-14T18:01:10Z",
    "title_canon_sha256": "09d104ba7f924b635a74f5b2ce8d81df893a6c9c4cb0bbdba11d653a7e6d8429"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.05931",
    "kind": "arxiv",
    "version": 2
  }
}