Pith Number

pith:42IXHVV2

pith:2010:42IXHVV22YXO6SA64HCMSBQWSY

not attested not anchored not stored refs pending

Lossy compression of discrete sources via Viterbi algorithm

Andrea Montanari, Shirin Jalali, Tsachy Weissman

arxiv:1011.3761 v2 · 2010-11-16 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42IXHVV22YXO6SA64HCMSBQWSY}

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	2026-05-18T00:57:57.545998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e69173d6bad62eef481ee1c4c906169626a1dddbf085bdc16b4c4d71f7f7d537

Aliases

arxiv: 1011.3761 · arxiv_version: 1011.3761v2 · doi: 10.48550/arxiv.1011.3761 · pith_short_12: 42IXHVV22YXO · pith_short_16: 42IXHVV22YXO6SA6 · pith_short_8: 42IXHVV2

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/42IXHVV22YXO6SA64HCMSBQWSY \
  | 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: e69173d6bad62eef481ee1c4c906169626a1dddbf085bdc16b4c4d71f7f7d537

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04ff5c002a70d161303f22fd77797e490975a10335f3241a4d14f55f109b9288",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2010-11-16T17:14:16Z",
    "title_canon_sha256": "c6647846d496c683750191dc00538a6b6edb982482688c890fe6781bd13d1d45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.3761",
    "kind": "arxiv",
    "version": 2
  }
}