Pith Number

pith:LD5CXTOJ

pith:2009:LD5CXTOJ4I2MKOCTOWJV5EXHIR

not attested not anchored not stored refs pending

A polycrystalline graphite model for the 2175 Angstrom interstellar extinction band

Renaud Papoular, Robert J. Papoular

arxiv:0902.2637 v1 · 2009-02-16 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LD5CXTOJ4I2MKOCTOWJV5EXHIR}

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	2026-05-18T02:14:47.702033Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

58fa2bcdc9e234c5385375935e92e744616a2c3f35f419ff748b0d7409bbae2a

Aliases

arxiv: 0902.2637 · arxiv_version: 0902.2637v1 · doi: 10.48550/arxiv.0902.2637 · pith_short_12: LD5CXTOJ4I2M · pith_short_16: LD5CXTOJ4I2MKOCT · pith_short_8: LD5CXTOJ

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/LD5CXTOJ4I2MKOCTOWJV5EXHIR \
  | 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: 58fa2bcdc9e234c5385375935e92e744616a2c3f35f419ff748b0d7409bbae2a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90bfe56db5e3d32dc6e83d5740050a2a3e0410482b0bdaff017dc2ceb449db10",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-02-16T09:10:03Z",
    "title_canon_sha256": "0ef16ec0db1232b11de7c3dbd8dd8abf68ebb12a1b7034f7552d5dd56a4aceb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2637",
    "kind": "arxiv",
    "version": 1
  }
}