Pith Number

pith:QDIPUGLX

pith:2019:QDIPUGLX3G4VT6VZLC6OFM5HAC

not attested not anchored not stored refs pending

Photosynthesis on habitable planets around low-mass stars

Abraham Loeb, Manasvi Lingam

arxiv:1901.01270 v2 · 2019-01-04 · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QDIPUGLX3G4VT6VZLC6OFM5HAC}

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	2026-05-17T23:49:14.695137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80d0fa1977d9b959fab958bce2b3a7008fd87017cc29a97e2b7ff2f91fce79b9

Aliases

arxiv: 1901.01270 · arxiv_version: 1901.01270v2 · doi: 10.48550/arxiv.1901.01270 · pith_short_12: QDIPUGLX3G4V · pith_short_16: QDIPUGLX3G4VT6VZ · pith_short_8: QDIPUGLX

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/QDIPUGLX3G4VT6VZLC6OFM5HAC \
  | 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: 80d0fa1977d9b959fab958bce2b3a7008fd87017cc29a97e2b7ff2f91fce79b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2da0a278c203a6b8c102349b2f4ab4f49613b4bd489aadb96535315d4fa01321",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-01-04T19:00:23Z",
    "title_canon_sha256": "8a5d8e6799426de44aa51522eaff42e6527032d35fa1033ff3a4a5d6342e7b34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.01270",
    "kind": "arxiv",
    "version": 2
  }
}