Pith Number

pith:PYIOGSYC

pith:2021:PYIOGSYC4LHCV7RPGQHMVMEPZJ

not attested not anchored not stored refs pending

SpongeCake: A Layered Microflake Surface Appearance Model

Beibei Wang, Ling-Qi Yan, Milo\v{s} Ha\v{s}an, Wenhua Jin

arxiv:2110.07145 v2 · 2021-10-14 · cs.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PYIOGSYC4LHCV7RPGQHMVMEPZJ}

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	2026-07-05T05:47:14.200616Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e10e34b02e2ce2afe2f340ecab08fca5ead92ccad29884de7ef70d1b2f61086

Aliases

arxiv: 2110.07145 · arxiv_version: 2110.07145v2 · doi: 10.48550/arxiv.2110.07145 · pith_short_12: PYIOGSYC4LHC · pith_short_16: PYIOGSYC4LHCV7RP · pith_short_8: PYIOGSYC

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/PYIOGSYC4LHCV7RPGQHMVMEPZJ \
  | 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: 7e10e34b02e2ce2afe2f340ecab08fca5ead92ccad29884de7ef70d1b2f61086

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb0506858e6adc4afc36db7a39dc85fdb37ce498f1e23ff88a0ec6434eaf5c12",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GR",
    "submitted_at": "2021-10-14T04:21:43Z",
    "title_canon_sha256": "31e2801e076f87babb04e19c2cea87872afba19a4d3cfab7be38eda851f9a0de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.07145",
    "kind": "arxiv",
    "version": 2
  }
}