Pith Number

pith:43572SDU

pith:2022:43572SDU76FKMMYIXGYLYWNFTA

not attested not anchored not stored refs pending

Fenrir: Physics-Enhanced Regression for Initial Value Problems

Filip Tronarp, Nathanael Bosch, Philipp Hennig

arxiv:2202.01287 v2 · 2022-02-02 · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{43572SDU76FKMMYIXGYLYWNFTA}

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	2026-07-05T06:13:14.544963Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6fbfd4874ff8aa63308b9b0bc59a5981477e50bc2d38affde4e48d50299dcfa

Aliases

arxiv: 2202.01287 · arxiv_version: 2202.01287v2 · doi: 10.48550/arxiv.2202.01287 · pith_short_12: 43572SDU76FK · pith_short_16: 43572SDU76FKMMYI · pith_short_8: 43572SDU

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/43572SDU76FKMMYIXGYLYWNFTA \
  | 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: e6fbfd4874ff8aa63308b9b0bc59a5981477e50bc2d38affde4e48d50299dcfa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8cc324d7f940d8cb38313325c0af9d4f12cbfdacd967f08d25b7f00c6c28feb",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2022-02-02T21:22:45Z",
    "title_canon_sha256": "632a9a38b1f0baa11caa9f4f00069bc701c7ea44ed491d31b62a951585212a45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2202.01287",
    "kind": "arxiv",
    "version": 2
  }
}