Pith Number

pith:7ZAAIAHK

pith:2021:7ZAAIAHKD77XOBFBNVHASQUK5D

not attested not anchored not stored refs pending

A brief history of AI: how to prevent another winter (a critical review)

Amirhosein Toosi, Andrea Bottino, Arman Rahmim, Babak Saboury, Eliot Siegel

arxiv:2109.01517 v3 · 2021-09-03 · cs.AI · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7ZAAIAHKD77XOBFBNVHASQUK5D}

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	2026-07-05T05:23:42.957985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe400400ea1fff7704a16d4e09428ae8d5648f4a333feccf7ca1f196cb4a64b0

Aliases

arxiv: 2109.01517 · arxiv_version: 2109.01517v3 · doi: 10.48550/arxiv.2109.01517 · pith_short_12: 7ZAAIAHKD77X · pith_short_16: 7ZAAIAHKD77XOBFB · pith_short_8: 7ZAAIAHK

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/7ZAAIAHKD77XOBFBNVHASQUK5D \
  | 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: fe400400ea1fff7704a16d4e09428ae8d5648f4a333feccf7ca1f196cb4a64b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4806da6aa27ba042558535c1ffec1f218b2fd9b2260cf84b3b02ae5189148dde",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2021-09-03T13:41:46Z",
    "title_canon_sha256": "a32fcfe4b2d18452e52b38e58ef69286d9aff1ab42931b5b6f14b98d64ae1db7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.01517",
    "kind": "arxiv",
    "version": 3
  }
}