Pith Number

pith:M4TAFULO

pith:2019:M4TAFULOJIHDBZGNNILKJPL5AX

not attested not anchored not stored refs pending

Ensemble Kalman filter for multiscale inverse problems

Andrea Zanoni, Assyr Abdulle, Giacomo Garegnani

arxiv:1908.05495 v2 · 2019-08-15 · 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{M4TAFULOJIHDBZGNNILKJPL5AX}

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	2026-07-05T01:59:26.413461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

672602d16e4a0e30e4cd6a16a4bd7d05ce6d9d05b0e78e9efce3f4b887f6dfe4

Aliases

arxiv: 1908.05495 · arxiv_version: 1908.05495v2 · doi: 10.48550/arxiv.1908.05495 · pith_short_12: M4TAFULOJIHD · pith_short_16: M4TAFULOJIHDBZGN · pith_short_8: M4TAFULO

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/M4TAFULOJIHDBZGNNILKJPL5AX \
  | 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: 672602d16e4a0e30e4cd6a16a4bd7d05ce6d9d05b0e78e9efce3f4b887f6dfe4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a785e0425fcd2fbd5b5a0ee2b786e5172b01bc25f458e21bdab4e6f5156d8af1",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-08-15T11:20:08Z",
    "title_canon_sha256": "7332a6078ad8b6c68ef5ead13759369bbbdc745a7d51c388e5e001a76514a374"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.05495",
    "kind": "arxiv",
    "version": 2
  }
}