Pith Number

pith:UGL3M4WU

pith:2023:UGL3M4WULCPKZVHXOOC54RH7JK

not attested not anchored not stored refs pending

Speeding up backpropagation of gradients through the Kalman filter via closed-form expressions

Axel Barrau, Colin Parellier, Silvere Bonnabel

arxiv:2303.16846 v2 · 2023-03-29 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UGL3M4WULCPKZVHXOOC54RH7JK}

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	2026-07-05T05:56:42.836079Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a197b672d4589eacd4f77385de44ff4a8107ffe3b2572c8c8aeb12b2c24d50f0

Aliases

arxiv: 2303.16846 · arxiv_version: 2303.16846v2 · doi: 10.48550/arxiv.2303.16846 · pith_short_12: UGL3M4WULCPK · pith_short_16: UGL3M4WULCPKZVHX · pith_short_8: UGL3M4WU

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/UGL3M4WULCPKZVHXOOC54RH7JK \
  | 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: a197b672d4589eacd4f77385de44ff4a8107ffe3b2572c8c8aeb12b2c24d50f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "053ab0c3a506bed0cb9b5a920344a2e812417f63c030c6e30300a2e96b7363df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2023-03-29T16:51:31Z",
    "title_canon_sha256": "a0b879bcce2cdcab41267e188c8ff1272f2e364b2b0c7bd49505eb191fa3bc57"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2303.16846",
    "kind": "arxiv",
    "version": 2
  }
}