Pith Number

pith:7UKIQRMX

pith:2020:7UKIQRMX3ZTKG4VIIMECFAITRP

not attested not anchored not stored refs pending

Time-Varying Parameters as Ridge Regressions

Philippe Goulet Coulombe

arxiv:2009.00401 v4 · 2020-09-01 · econ.EM · stat.AP · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7UKIQRMX3ZTKG4VIIMECFAITRP}

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	2026-07-05T09:35:31.356419Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd14884597de66a372a843082281138bf546bbdf12739064acbcb99451bff01a

Aliases

arxiv: 2009.00401 · arxiv_version: 2009.00401v4 · doi: 10.48550/arxiv.2009.00401 · pith_short_12: 7UKIQRMX3ZTK · pith_short_16: 7UKIQRMX3ZTKG4VI · pith_short_8: 7UKIQRMX

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/7UKIQRMX3ZTKG4VIIMECFAITRP \
  | 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: fd14884597de66a372a843082281138bf546bbdf12739064acbcb99451bff01a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7220541260652feb845773335fcfb9d95a93c81d6e89af863fc587d78de082d8",
    "cross_cats_sorted": [
      "stat.AP",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "econ.EM",
    "submitted_at": "2020-09-01T13:07:04Z",
    "title_canon_sha256": "8b37c3cfb4b7db0c75eb295a11675cfd4d7d21988ce76b59d59eb3f2554e91fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.00401",
    "kind": "arxiv",
    "version": 4
  }
}