Pith Number

pith:QQBZDJE7

pith:2019:QQBZDJE7W25PCBW5PE354CREWI

not attested not anchored not stored refs pending

Circular spectropolarimetric sensing of vegetation in the field; possibilities for the remote detection of extraterrestrial life

C.H. Lucas Patty, Frans Snik, Freek Ariese, G\'abor Steinbach, Inge Loes ten Kate, Rob J.M. van Spanning, Wybren Jan Buma

arxiv:1902.05859 v2 · 2019-02-15 · astro-ph.EP · physics.bio-ph · q-bio.BM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQBZDJE7W25PCBW5PE354CREWI}

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	2026-07-04T23:51:20.895918Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

840391a49fb6baf106dd7937de0a24b2035e44b44f0d75afc2200ae7dc5869f5

Aliases

arxiv: 1902.05859 · arxiv_version: 1902.05859v2 · doi: 10.48550/arxiv.1902.05859 · pith_short_12: QQBZDJE7W25P · pith_short_16: QQBZDJE7W25PCBW5 · pith_short_8: QQBZDJE7

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/QQBZDJE7W25PCBW5PE354CREWI \
  | 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: 840391a49fb6baf106dd7937de0a24b2035e44b44f0d75afc2200ae7dc5869f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "809568b537be4be4eb41bb664fc1532d8fa2fc89e514d6dad314e1726bdc25cb",
    "cross_cats_sorted": [
      "physics.bio-ph",
      "q-bio.BM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-02-15T15:48:01Z",
    "title_canon_sha256": "c050a0dbf20ac400d25898db574e714bfa24e389e900287ef3edde19ff124b24"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.05859",
    "kind": "arxiv",
    "version": 2
  }
}