Pith Number

pith:4EWWJF5W

pith:2020:4EWWJF5WMBYIQZT25YRSXKUOSO

not attested not anchored not stored refs pending

Inverse Filtering for Hidden Markov Models with Applications to Counter-Adversarial Autonomous Systems

Bo Wahlberg, Cristian R. Rojas, Robert Mattila, Vikram Krishnamurthy

arxiv:2001.11809 v1 · 2020-01-31 · eess.SY · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4EWWJF5WMBYIQZT25YRSXKUOSO}

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	2026-07-05T01:46:47.184698Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e12d6497b6607088667aee232baa8e93b044e89a9242ed2e6348f5cd145f3c2d

Aliases

arxiv: 2001.11809 · arxiv_version: 2001.11809v1 · doi: 10.48550/arxiv.2001.11809 · pith_short_12: 4EWWJF5WMBYI · pith_short_16: 4EWWJF5WMBYIQZT2 · pith_short_8: 4EWWJF5W

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/4EWWJF5WMBYIQZT25YRSXKUOSO \
  | 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: e12d6497b6607088667aee232baa8e93b044e89a9242ed2e6348f5cd145f3c2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8975d1a86354c13c62a90793e9cc335f0809a4eca8f0bce164e1872cb65a5090",
    "cross_cats_sorted": [
      "cs.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SY",
    "submitted_at": "2020-01-31T13:11:11Z",
    "title_canon_sha256": "f3f17fcf2e37a1142519373d4166fc6aec44ff94f87b111ec80189617bdc6f27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.11809",
    "kind": "arxiv",
    "version": 1
  }
}