Pith Number

pith:XP3ESJUB

pith:2011:XP3ESJUBFSWP2RK3RXETA6PERY

not attested not anchored not stored refs pending

Interstellar Grains: 50 Years On

N. Chandra Wickramasinghe (University of Buckingham, UK)

arxiv:1112.3937 v1 · 2011-12-16 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XP3ESJUBFSWP2RK3RXETA6PERY}

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	2026-05-18T04:06:08.435884Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbf64926812cacfd455b8dc93079e48e06ff9c03b4abe3163cd7e9145babbd04

Aliases

arxiv: 1112.3937 · arxiv_version: 1112.3937v1 · doi: 10.48550/arxiv.1112.3937 · pith_short_12: XP3ESJUBFSWP · pith_short_16: XP3ESJUBFSWP2RK3 · pith_short_8: XP3ESJUB

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/XP3ESJUBFSWP2RK3RXETA6PERY \
  | 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: bbf64926812cacfd455b8dc93079e48e06ff9c03b4abe3163cd7e9145babbd04

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a17720cb14048da26bc44119e2c0281cd2bf983f48d8d4867f1abad5edfb5ea6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-12-16T20:13:57Z",
    "title_canon_sha256": "6727a45bbe5641c9d9635af9a907fe16e58a261f7dc4ae7d72918c75e252c37d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.3937",
    "kind": "arxiv",
    "version": 1
  }
}