Pith Number

pith:T6RMDHI2

pith:2018:T6RMDHI27Z37MCI6PN3HVOO2NI

not attested not anchored not stored refs pending

Cross-ratio dynamics on ideal polygons

Dmitry Fuchs, Ivan Izmestiev, Maxim Arnold, Serge Tabachnikov

arxiv:1812.05337 v1 · 2018-12-13 · math.DS · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T6RMDHI27Z37MCI6PN3HVOO2NI}

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	2026-05-17T23:58:23.710462Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fa2c19d1afe77f6091e7b767ab9da6a09e9392a355f0d02c442ecee96656dcd

Aliases

arxiv: 1812.05337 · arxiv_version: 1812.05337v1 · doi: 10.48550/arxiv.1812.05337 · pith_short_12: T6RMDHI27Z37 · pith_short_16: T6RMDHI27Z37MCI6 · pith_short_8: T6RMDHI2

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/T6RMDHI27Z37MCI6PN3HVOO2NI \
  | 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: 9fa2c19d1afe77f6091e7b767ab9da6a09e9392a355f0d02c442ecee96656dcd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf6c0147e44510ba1c3f41bac385fe38f636769c29c3beb7f8bc3ad4e122aa0b",
    "cross_cats_sorted": [
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2018-12-13T09:41:49Z",
    "title_canon_sha256": "fe9ee2a67589d47a3f96178c17910ade82962979f238296886912ff5b742f872"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.05337",
    "kind": "arxiv",
    "version": 1
  }
}