Pith Number

pith:A3WJC42H

pith:2014:A3WJC42H2RCI5ZRPDIRMVTQUC2

not attested not anchored not stored refs pending

A Hitchhiker's Guide to Automatic Differentiation

Philipp H. W. Hoffmann

arxiv:1411.0583 v5 · 2014-11-03 · math.NA · 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{A3WJC42H2RCI5ZRPDIRMVTQUC2}

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	2026-05-18T01:11:27.579718Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06ec917347d4448ee62f1a22cace141694d5d76ca01d90d5226dd3180d32b01f

Aliases

arxiv: 1411.0583 · arxiv_version: 1411.0583v5 · doi: 10.48550/arxiv.1411.0583 · pith_short_12: A3WJC42H2RCI · pith_short_16: A3WJC42H2RCI5ZRP · pith_short_8: A3WJC42H

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/A3WJC42H2RCI5ZRPDIRMVTQUC2 \
  | 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: 06ec917347d4448ee62f1a22cace141694d5d76ca01d90d5226dd3180d32b01f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d2721f77e028d8a83edadcb92ceec0a678e1832a7e6baf0007c4a3632e7b135",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-11-03T17:52:50Z",
    "title_canon_sha256": "d913c0cefc725d999a43568a6d2324f4203a4d0eca127d556ff4dec73e88c5ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.0583",
    "kind": "arxiv",
    "version": 5
  }
}