Pith Number

pith:QPLFPSWV

pith:1997:QPLFPSWVKBR6RWG5V5RXRXUUOT

not attested not anchored not stored refs pending

Dehn surgery on arboresent knots and links -- a survey

Ying-Qing Wu

arxiv:math/9704221 v1 · 1997-04-17 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QPLFPSWVKBR6RWG5V5RXRXUUOT}

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	2026-05-18T01:38:22.987483Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83d657cad55063e8d8ddaf6378de9474e06d05c490492cb25518f7717b44dc2d

Aliases

arxiv: math/9704221 · arxiv_version: math/9704221v1 · doi: 10.48550/arxiv.math/9704221 · pith_short_12: QPLFPSWVKBR6 · pith_short_16: QPLFPSWVKBR6RWG5 · pith_short_8: QPLFPSWV

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/QPLFPSWVKBR6RWG5V5RXRXUUOT \
  | 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: 83d657cad55063e8d8ddaf6378de9474e06d05c490492cb25518f7717b44dc2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38e47e27cadcaabc022722dd4d73926244db6f0098713e71a54aec4511720fde",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.GT",
    "submitted_at": "1997-04-17T00:00:00Z",
    "title_canon_sha256": "29b260e788ad3f2b071b014fc5a36641f7dbc3e602b5ed9d8d9083e9853981f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9704221",
    "kind": "arxiv",
    "version": 1
  }
}