Pith Number

pith:XMATHAPC

pith:1999:XMATHAPC6UG4DGEJWSKLDTKQ2A

not attested not anchored not stored refs pending

Small and Very Small Interstellar Grains

Adolf N. Witt

arxiv:astro-ph/9910259 v2 · 1999-10-14 · astro-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{XMATHAPC6UG4DGEJWSKLDTKQ2A}

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	2026-05-18T01:40:12.548346Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb013381e2f50dc19889b494b1cd50d030cfa33187ba0fb2f3cfc37fc1926723

Aliases

arxiv: astro-ph/9910259 · arxiv_version: astro-ph/9910259v2 · doi: 10.48550/arxiv.astro-ph/9910259 · pith_short_12: XMATHAPC6UG4 · pith_short_16: XMATHAPC6UG4DGEJ · pith_short_8: XMATHAPC

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/XMATHAPC6UG4DGEJWSKLDTKQ2A \
  | 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: bb013381e2f50dc19889b494b1cd50d030cfa33187ba0fb2f3cfc37fc1926723

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00cfb90b5470492f2ac2ebe31d4b111af9925407f2ec5af21ed26206c81ddf4b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-10-14T12:55:11Z",
    "title_canon_sha256": "8d4ec0fa4e1c8a2e9f16b3394ef60b87705c9251d7cb7076c6aa66b9806c928c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9910259",
    "kind": "arxiv",
    "version": 2
  }
}