Pith Number

pith:Y4WRQHSM

pith:2009:Y4WRQHSMRH2JHT7HYLTXKDOCV4

not attested not anchored not stored refs pending

Exploring the Use of Virtual Worlds as a Scientific Research Platform: The Meta-Institute for Computational Astrophysics (MICA)

E. Vesperini, M. J. Graham, P. Hut, R. Knop, S. G. Djorgovski, S. McMillan, W. Farr

arxiv:0907.3520 v1 · 2009-07-21 · astro-ph.IM · cs.CY · physics.ed-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{Y4WRQHSMRH2JHT7HYLTXKDOCV4}

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	2026-05-18T02:12:55.289235Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c72d181e4c89f493cfe7c2e7750dc2af02c19c1f4ce0cf3368e56da64a634bc0

Aliases

arxiv: 0907.3520 · arxiv_version: 0907.3520v1 · doi: 10.48550/arxiv.0907.3520 · pith_short_12: Y4WRQHSMRH2J · pith_short_16: Y4WRQHSMRH2JHT7H · pith_short_8: Y4WRQHSM

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/Y4WRQHSMRH2JHT7HYLTXKDOCV4 \
  | 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: c72d181e4c89f493cfe7c2e7750dc2af02c19c1f4ce0cf3368e56da64a634bc0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61d5ca5c265c9a3e6d4f93c689d0112956623f06c5cd36634583cd5ddd625252",
    "cross_cats_sorted": [
      "cs.CY",
      "physics.ed-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-07-21T00:43:24Z",
    "title_canon_sha256": "f9c04980c4083d6375a12975815944f95af7eac344de163ceb7dba6a7b6f2986"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3520",
    "kind": "arxiv",
    "version": 1
  }
}