Pith Number

pith:2LERLJBF

pith:2015:2LERLJBFKC5WV7GNFSZB4PVMKJ

not attested not anchored not stored refs pending

On Sharing, Memoization, and Polynomial Time (Long Version)

Martin Avanzini, Ugo Dal Lago

arxiv:1501.00894 v1 · 2015-01-05 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2LERLJBFKC5WV7GNFSZB4PVMKJ}

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	2026-05-18T02:30:01.640153Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2c915a42550bb6afccd2cb21e3eac526a7903be7d6a81ddd75d84361e1f647a

Aliases

arxiv: 1501.00894 · arxiv_version: 1501.00894v1 · doi: 10.48550/arxiv.1501.00894 · pith_short_12: 2LERLJBFKC5W · pith_short_16: 2LERLJBFKC5WV7GN · pith_short_8: 2LERLJBF

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/2LERLJBFKC5WV7GNFSZB4PVMKJ \
  | 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: d2c915a42550bb6afccd2cb21e3eac526a7903be7d6a81ddd75d84361e1f647a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4050b934e1656fff846973f5a3a37018fb64551d4a575473d9e81728099c7193",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2015-01-05T15:34:07Z",
    "title_canon_sha256": "e5f6a6355a1130785a3f4796d936aecd956cbf4f6e140cd0622aface31a877dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.00894",
    "kind": "arxiv",
    "version": 1
  }
}