Pith Number

pith:BKYCK6GM

pith:2012:BKYCK6GMWX2XXQHTMZ7EKMDKF5

not attested not anchored not stored refs pending

A recent tipping point in the Arctic sea-ice cover: abrupt and persistent increase in the seasonal cycle since 2007

Timothy M. Lenton, Valerie N. Livina

arxiv:1204.5445 v2 · 2012-04-24 · physics.geo-ph · math.DS · physics.ao-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BKYCK6GMWX2XXQHTMZ7EKMDKF5}

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	2026-05-18T03:35:54.111539Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ab02578ccb5f57bc0f3667e45306a2f4f2909d3ba3f6a4ef67faac17940e984

Aliases

arxiv: 1204.5445 · arxiv_version: 1204.5445v2 · doi: 10.48550/arxiv.1204.5445 · pith_short_12: BKYCK6GMWX2X · pith_short_16: BKYCK6GMWX2XXQHT · pith_short_8: BKYCK6GM

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/BKYCK6GMWX2XXQHTMZ7EKMDKF5 \
  | 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: 0ab02578ccb5f57bc0f3667e45306a2f4f2909d3ba3f6a4ef67faac17940e984

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad6741468c8c92dd0a3386e4c4e42aca16e89358b9139a77155d39b7b771ba50",
    "cross_cats_sorted": [
      "math.DS",
      "physics.ao-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "2012-04-24T17:39:01Z",
    "title_canon_sha256": "c33147d593db846ba80b64d149315b333fa4b9532d65263ef997df272e8aabb0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5445",
    "kind": "arxiv",
    "version": 2
  }
}