Pith Number

pith:ADNVR3FT

pith:2012:ADNVR3FTYZGKZ75RCBW2CVA35H

not attested not anchored not stored refs pending

Tractrices, Bicycle Tire Tracks, Hatchet Planimeters, and a 100-year-old Conjecture

M. Levi, R.L. Foote, S. Tabachnikov

arxiv:1207.0834 v1 · 2012-07-03 · 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{ADNVR3FTYZGKZ75RCBW2CVA35H}

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	2026-05-18T03:51:00.083924Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

00db58ecb3c64cacffb1106da1541be9e812973946cddb92db6b04142795987b

Aliases

arxiv: 1207.0834 · arxiv_version: 1207.0834v1 · doi: 10.48550/arxiv.1207.0834 · pith_short_12: ADNVR3FTYZGK · pith_short_16: ADNVR3FTYZGKZ75R · pith_short_8: ADNVR3FT

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/ADNVR3FTYZGKZ75RCBW2CVA35H \
  | 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: 00db58ecb3c64cacffb1106da1541be9e812973946cddb92db6b04142795987b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f5428c99e310711d45e6ffd2df05b34d2839895ea92b2d85ecb012b1e1c930f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2012-07-03T20:54:20Z",
    "title_canon_sha256": "3649a7353541f19b98dc730081a4df6d0993b13d13a3faadfa65607c93e04f63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0834",
    "kind": "arxiv",
    "version": 1
  }
}