Pith Number

pith:D5PGTM32

pith:2025:D5PGTM32IS73TFZUUMCFFOIINF

not attested not anchored not stored refs pending

Tensor-Var: Efficient Four-Dimensional Variational Data Assimilation

Boli Chen, Daniel Giles, Sibo Cheng, Xiao Xue, Xiaoyuan Cheng, Yi He, Yiming Yang, Yukun Hu

arxiv:2501.13312 v3 · 2025-01-23 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D5PGTM32IS73TFZUUMCFFOIINF}

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	2026-07-05T11:20:49.903793Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f5e69b37a44bfb99734a30452b908696f656ef99ebe34f8a3fd9a5eb9de5f80

Aliases

arxiv: 2501.13312 · arxiv_version: 2501.13312v3 · doi: 10.48550/arxiv.2501.13312 · pith_short_12: D5PGTM32IS73 · pith_short_16: D5PGTM32IS73TFZU · pith_short_8: D5PGTM32

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/D5PGTM32IS73TFZUUMCFFOIINF \
  | 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: 1f5e69b37a44bfb99734a30452b908696f656ef99ebe34f8a3fd9a5eb9de5f80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "47902c12c8ebd9912ea0d73b0d84d5d50c6a94b0200c8ab989985f647c2f1363",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-01-23T01:43:31Z",
    "title_canon_sha256": "dbe055175dcc84e74ff59575bac4704f12ff95f0a8c4bca4b39c7e82ce5835ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.13312",
    "kind": "arxiv",
    "version": 3
  }
}