Pith Number

pith:Z23Z73OK

pith:2022:Z23Z73OKT4CQHSWOQZUW6SDVYS

not attested not anchored not stored refs pending

When Will Arctic Sea Ice Disappear? Projections of Area, Extent, Thickness, and Volume

Boyuan Zhang, Francis X. Diebold, Glenn D. Rudebusch, Maximilian Goebel, Philippe Goulet Coulombe

arxiv:2203.04040 v3 · 2022-03-08 · econ.EM · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z23Z73OKT4CQHSWOQZUW6SDVYS}

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	2026-07-05T06:12:31.431167Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ceb79fedca9f0503cace86696f4875c4a0ffbb5e2aa257d0c52ffb56d698111e

Aliases

arxiv: 2203.04040 · arxiv_version: 2203.04040v3 · doi: 10.48550/arxiv.2203.04040 · pith_short_12: Z23Z73OKT4CQ · pith_short_16: Z23Z73OKT4CQHSWO · pith_short_8: Z23Z73OK

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/Z23Z73OKT4CQHSWOQZUW6SDVYS \
  | 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: ceb79fedca9f0503cace86696f4875c4a0ffbb5e2aa257d0c52ffb56d698111e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4cbfc5ae4b3d5120d649ae32f22af1efbf25de1e5ffd001396d657556694030c",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "econ.EM",
    "submitted_at": "2022-03-08T12:20:57Z",
    "title_canon_sha256": "3e1e21915b70fc8db5977bc69101ea98d079e01673d3dfe91f2908c02a82b92b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.04040",
    "kind": "arxiv",
    "version": 3
  }
}