Pith Number

pith:7CSI4AP4

pith:1997:7CSI4AP42KUXRZD7NOEXE3KFZJ

not attested not anchored not stored refs pending

Stably non-synchronizable maps of the plane

Charles Tresser, Marco Martens, Patrice Le Calvez, Patrick A. Worfolk

arxiv:math/9702225 v1 · 1997-02-15 · 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{7CSI4AP42KUXRZD7NOEXE3KFZJ}

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	2026-05-18T01:05:37.119444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8a48e01fcd2a978e47f6b89726d45ca50fd9c1f127094f2769c3a9711e25e9a

Aliases

arxiv: math/9702225 · arxiv_version: math/9702225v1 · doi: 10.48550/arxiv.math/9702225 · pith_short_12: 7CSI4AP42KUX · pith_short_16: 7CSI4AP42KUXRZD7 · pith_short_8: 7CSI4AP4

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/7CSI4AP42KUXRZD7NOEXE3KFZJ \
  | 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: f8a48e01fcd2a978e47f6b89726d45ca50fd9c1f127094f2769c3a9711e25e9a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa03b250d22360cb7f44c0f91a823fb3460cdaddf81fd25f843e9ba6812b4729",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.DS",
    "submitted_at": "1997-02-15T00:00:00Z",
    "title_canon_sha256": "58a706876e504964b490ac6451e8d6c3b0b1f2a2cdff2e81281d09ea84ab63f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9702225",
    "kind": "arxiv",
    "version": 1
  }
}