Pith Number

pith:2G27HGB5

pith:2022:2G27HGB5AOKFHF7QOHC33PKBFZ

not attested not anchored not stored refs pending

The Companion Model -- a Canonical Model in Graph Signal Processing

John Shi, Jose M. F. Moura

arxiv:2203.13791 v1 · 2022-03-25 · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2G27HGB5AOKFHF7QOHC33PKBFZ}

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	2026-07-05T04:08:36.227561Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1b5f3983d03945397f071c5bdbd412e6bf7fdac0dda02f1586fdea641ed4691

Aliases

arxiv: 2203.13791 · arxiv_version: 2203.13791v1 · doi: 10.48550/arxiv.2203.13791 · pith_short_12: 2G27HGB5AOKF · pith_short_16: 2G27HGB5AOKFHF7Q · pith_short_8: 2G27HGB5

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/2G27HGB5AOKFHF7QOHC33PKBFZ \
  | 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: d1b5f3983d03945397f071c5bdbd412e6bf7fdac0dda02f1586fdea641ed4691

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dbb4bc2176d2051be7ed1d1079d4a845b14780bfc5afbefb4d9740921ddcff5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2022-03-25T17:20:52Z",
    "title_canon_sha256": "f1c36288606147b0842eaece2b5f2636875a3f68491120739343ff29ffb92474"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.13791",
    "kind": "arxiv",
    "version": 1
  }
}