Pith Number

pith:I5OB3WCC

pith:2018:I5OB3WCCFX5OXFX7UUP3FO7REC

not attested not anchored not stored refs pending

Semi-automatically optimized calibration of internal combustion engines

Manuel Radons, Marc E. Pfetsch, Michael Joswig, Stefan Ulbrich, Timo Burggraf

arxiv:1806.10980 v2 · 2018-06-28 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I5OB3WCCFX5OXFX7UUP3FO7REC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:55:03.463956Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

475c1dd8422dfaeb96ffa51fb2bbf1208e876194759d7169c44a65783e2272c3

Aliases

arxiv: 1806.10980 · arxiv_version: 1806.10980v2 · doi: 10.48550/arxiv.1806.10980 · pith_short_12: I5OB3WCCFX5O · pith_short_16: I5OB3WCCFX5OXFX7 · pith_short_8: I5OB3WCC

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/I5OB3WCCFX5OXFX7UUP3FO7REC \
  | 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: 475c1dd8422dfaeb96ffa51fb2bbf1208e876194759d7169c44a65783e2272c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a38820b2e0b549503afb841be1e68278e39ea2e59d7ad58cd89b0866bc032316",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-06-28T13:59:47Z",
    "title_canon_sha256": "9c1d2ff0277cd3f60cc7d68d29d8cb98ced133c1c94d57a4359c565d2036e2ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.10980",
    "kind": "arxiv",
    "version": 2
  }
}