Pith Number

pith:E4I2ZGRE

pith:2009:E4I2ZGRE77ZBPOOPTKTOEDTW7P

not attested not anchored not stored refs pending

Colors of a Second Earth: Estimating the fractional areas of ocean, land, and vegetation of Earth-like exoplanets

A. Taruya, E. L. Turner, H. Kawahara, S. Fukuda, T. Nakajima, Y. Fujii (U. of Tokyo), Y. Suto

arxiv:0911.5621 v2 · 2009-11-30 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E4I2ZGRE77ZBPOOPTKTOEDTW7P}

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	2026-05-18T02:34:03.038990Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2711ac9a24fff217b9cf9aa6e20e76fbfd7f7c7ff850e14a4c0008e1f6c9f647

Aliases

arxiv: 0911.5621 · arxiv_version: 0911.5621v2 · doi: 10.48550/arxiv.0911.5621 · pith_short_12: E4I2ZGRE77ZB · pith_short_16: E4I2ZGRE77ZBPOOP · pith_short_8: E4I2ZGRE

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/E4I2ZGRE77ZBPOOPTKTOEDTW7P \
  | 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: 2711ac9a24fff217b9cf9aa6e20e76fbfd7f7c7ff850e14a4c0008e1f6c9f647

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80cd1e2c1e8f4d75eb51a92d41b07fece2e3fc935780dc19700733d5a0dfeeeb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-11-30T20:33:21Z",
    "title_canon_sha256": "98865c5b028150986ea4aa95a91e2459a2cae42303c9e28b2af8a4a14a976837"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.5621",
    "kind": "arxiv",
    "version": 2
  }
}