Pith Number

pith:Q32Y5GA5

pith:2025:Q32Y5GA5P5UDQPBJV37IWWYVLF

not attested not anchored not stored refs pending

Symplectic semi-characteristics

Hao Zhuang

arxiv:2505.14496 v1 · 2025-05-20 · math.SG · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q32Y5GA5P5UDQPBJV37IWWYVLF}

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	2026-05-27T14:06:37.084692Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86f58e981d7f68383c29aefe8b5b15595eac17497fa6c173384f88d36f8e6733

Aliases

arxiv: 2505.14496 · arxiv_version: 2505.14496v1 · doi: 10.48550/arxiv.2505.14496 · pith_short_12: Q32Y5GA5P5UD · pith_short_16: Q32Y5GA5P5UDQPBJ · pith_short_8: Q32Y5GA5

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/Q32Y5GA5P5UDQPBJV37IWWYVLF \
  | 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: 86f58e981d7f68383c29aefe8b5b15595eac17497fa6c173384f88d36f8e6733

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "283ab05f45a67d34394cad6e021e917c648b33b870780cf2e4cd2e7d480b0020",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2025-05-20T15:25:17Z",
    "title_canon_sha256": "bfbc6a436233db0d1e7686c6d626649fa605858206ae0009d0b3da1595f77f77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.14496",
    "kind": "arxiv",
    "version": 1
  }
}