Pith Number

pith:BB7XQWYP

pith:2014:BB7XQWYPIVQ6FCOFQFVUUZDBCZ

not attested not anchored not stored refs pending

Topology optimisation for natural convection problems

Casper Schousboe Andreasen, Joe Alexandersen, Niels Aage, Ole Sigmund

arxiv:1408.2102 v1 · 2014-08-09 · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BB7XQWYPIVQ6FCOFQFVUUZDBCZ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:35:12.167761Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

087f785b0f4561e289c5816b4a6461167fa837f36fa523d425f4723d5bf442f6

Aliases

arxiv: 1408.2102 · arxiv_version: 1408.2102v1 · doi: 10.48550/arxiv.1408.2102 · pith_short_12: BB7XQWYPIVQ6 · pith_short_16: BB7XQWYPIVQ6FCOF · pith_short_8: BB7XQWYP

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/BB7XQWYPIVQ6FCOFQFVUUZDBCZ \
  | 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: 087f785b0f4561e289c5816b4a6461167fa837f36fa523d425f4723d5bf442f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a7671ba97fb30bcc7d39cf00ccf05e5e50ac0f9ca74ca05aa6ae9511b25646f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2014-08-09T14:22:24Z",
    "title_canon_sha256": "01f98de8a498b43be00d9d5ba2b233bd2eebd5dd7c5ac742e1ef100ba5e6e8c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.2102",
    "kind": "arxiv",
    "version": 1
  }
}