Pith Number

pith:NGR2U4LA

pith:2019:NGR2U4LAMPX7YMTZMBPQOKC7KS

not attested not anchored not stored refs pending

Separating value functions across time-scales

Ahmed Touati, Emma Brunskill, Joelle Pineau, Joshua Romoff, Peter Henderson, Yann Ollivier

arxiv:1902.01883 v3 · 2019-02-05 · cs.LG · cs.AI · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NGR2U4LAMPX7YMTZMBPQOKC7KS}

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	2026-05-17T23:45:09.219872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69a3aa716063effc3279605f07285f54a95db3cf4097aa649b545c4cf54fc975

Aliases

arxiv: 1902.01883 · arxiv_version: 1902.01883v3 · doi: 10.48550/arxiv.1902.01883 · pith_short_12: NGR2U4LAMPX7 · pith_short_16: NGR2U4LAMPX7YMTZ · pith_short_8: NGR2U4LA

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/NGR2U4LAMPX7YMTZMBPQOKC7KS \
  | 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: 69a3aa716063effc3279605f07285f54a95db3cf4097aa649b545c4cf54fc975

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a1bd1431160a34a58cf78286f3b6ece3eb385b049f192f96ab811433a4321eb",
    "cross_cats_sorted": [
      "cs.AI",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-02-05T19:45:08Z",
    "title_canon_sha256": "d5178c5538ccf858938fafa33aa4992765388c82477036c3db7cf9d92c472b6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.01883",
    "kind": "arxiv",
    "version": 3
  }
}