Pith Number

pith:QVCGCUMM

pith:1998:QVCGCUMMKY75NITROF5OD4YD6Q

not attested not anchored not stored refs pending

How to find discrete contact symmetries

Peter E. Hydon

arxiv:math/9810204 v1 · 1998-10-01 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QVCGCUMMKY75NITROF5OD4YD6Q}

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	2026-05-18T01:38:22.734224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

854461518c563fd6a271717ae1f303f4046a439c216a243b7e06946a1c0966a4

Aliases

arxiv: math/9810204 · arxiv_version: math/9810204v1 · doi: 10.48550/arxiv.math/9810204 · pith_short_12: QVCGCUMMKY75 · pith_short_16: QVCGCUMMKY75NITR · pith_short_8: QVCGCUMM

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/QVCGCUMMKY75NITROF5OD4YD6Q \
  | 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: 854461518c563fd6a271717ae1f303f4046a439c216a243b7e06946a1c0966a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26cb2fe98eaabe07144a8a5d6deec4b99ed27ce77f9361db040cb21fc0ef2cf8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.DS",
    "submitted_at": "1998-10-01T00:00:00Z",
    "title_canon_sha256": "612a1581c68a6a4f514dd063f6da5e12664975027cbecbf09d0f1b90f7bca97c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9810204",
    "kind": "arxiv",
    "version": 1
  }
}