Pith Number

pith:BNPV2Q2P

pith:1998:BNPV2Q2P5DNW6DR2EJ5SU6AX6O

not attested not anchored not stored refs pending

Nonlinear projective filtering in a data stream

Marcus Richter, Thomas Schreiber

arxiv:chao-dyn/9803008 v1 · 1998-03-05 · chao-dyn · nlin.CD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BNPV2Q2P5DNW6DR2EJ5SU6AX6O}

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	2026-05-18T01:40:11.694928Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b5f5d434fe8db6f0e3a227b2a7817f39b53752e7236395125be33f1ac9ae58f

Aliases

arxiv: chao-dyn/9803008 · arxiv_version: chao-dyn/9803008v1 · doi: 10.48550/arxiv.chao-dyn/9803008 · pith_short_12: BNPV2Q2P5DNW · pith_short_16: BNPV2Q2P5DNW6DR2 · pith_short_8: BNPV2Q2P

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/BNPV2Q2P5DNW6DR2EJ5SU6AX6O \
  | 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: 0b5f5d434fe8db6f0e3a227b2a7817f39b53752e7236395125be33f1ac9ae58f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcd9a41188f216ed00a6331f9ae0479ef81d433d96821b8593d8a43b13d4b939",
    "cross_cats_sorted": [
      "nlin.CD"
    ],
    "license": "",
    "primary_cat": "chao-dyn",
    "submitted_at": "1998-03-05T15:24:18Z",
    "title_canon_sha256": "736bf109eaec42817b44b638151ac7a32caccca09b543ef6a8f91d96f83bee0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "chao-dyn/9803008",
    "kind": "arxiv",
    "version": 1
  }
}