Pith Number

pith:BZ5RKAGE

pith:2015:BZ5RKAGEQ3VS7OKKSEXLEYZHD5

not attested not anchored not stored refs pending

What is Learning? A primary discussion about information and Representation

Hao Wu

arxiv:1505.04813 v1 · 2015-05-19 · 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{BZ5RKAGEQ3VS7OKKSEXLEYZHD5}

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	2026-05-18T02:05:23.161500Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e7b1500c486eb2fb94a912eb263271f49c15ae8008e4e2819fdeb760fbc9dda

Aliases

arxiv: 1505.04813 · arxiv_version: 1505.04813v1 · doi: 10.48550/arxiv.1505.04813 · pith_short_12: BZ5RKAGEQ3VS · pith_short_16: BZ5RKAGEQ3VS7OKK · pith_short_8: BZ5RKAGE

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/BZ5RKAGEQ3VS7OKKSEXLEYZHD5 \
  | 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: 0e7b1500c486eb2fb94a912eb263271f49c15ae8008e4e2819fdeb760fbc9dda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88a5ec68b23451e35320c229149e4e24b52eaeb468bc2566dca7ba531a130776",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2015-05-19T01:17:47Z",
    "title_canon_sha256": "4909f428230f07e5ad454913aa6178fa6fe90d4a12af682a5ec879b008939db9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.04813",
    "kind": "arxiv",
    "version": 1
  }
}