Pith Number

pith:3CVX2QVZ

pith:2012:3CVX2QVZ52JVGONU6PLHUY4ODO

not attested not anchored not stored refs pending

AD in Fortran, Part 1: Design

Alexey Radul, Barak A. Pearlmutter, Jeffrey Mark Siskind

arxiv:1203.1448 v2 · 2012-03-07 · cs.PL · cs.MS · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3CVX2QVZ52JVGONU6PLHUY4ODO}

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	2026-05-18T04:00:37.530941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8ab7d42b9ee935339b4f3d67a638e1ba7e336023805b96b7eb03d14f7822ab7

Aliases

arxiv: 1203.1448 · arxiv_version: 1203.1448v2 · doi: 10.48550/arxiv.1203.1448 · pith_short_12: 3CVX2QVZ52JV · pith_short_16: 3CVX2QVZ52JVGONU · pith_short_8: 3CVX2QVZ

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/3CVX2QVZ52JVGONU6PLHUY4ODO \
  | 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: d8ab7d42b9ee935339b4f3d67a638e1ba7e336023805b96b7eb03d14f7822ab7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "306b651c2b3af09a91d8dc8dc398e4683bd3db78ac6c4628857068d4898fe8b8",
    "cross_cats_sorted": [
      "cs.MS",
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2012-03-07T12:04:05Z",
    "title_canon_sha256": "b1272309806b43e3e53aef1931cc5e5eefab4817d04087f6c371a04fc49fce12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.1448",
    "kind": "arxiv",
    "version": 2
  }
}