Pith Number

pith:XXL37NWO

pith:2016:XXL37NWOCO33U3P6FFGZNWH6NC

not attested not anchored not stored refs pending

How do you fix an Oval Track Puzzle?

David A. Nash, Sara Randall

arxiv:1612.04476 v3 · 2016-12-14 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XXL37NWOCO33U3P6FFGZNWH6NC}

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	2026-05-18T00:22:21.111959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bdd7bfb6ce13b7ba6dfe294d96d8fe68b084e88cf48e6c6e2c7696e3fd687b84

Aliases

arxiv: 1612.04476 · arxiv_version: 1612.04476v3 · doi: 10.48550/arxiv.1612.04476 · pith_short_12: XXL37NWOCO33 · pith_short_16: XXL37NWOCO33U3P6 · pith_short_8: XXL37NWO

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/XXL37NWOCO33U3P6FFGZNWH6NC \
  | 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: bdd7bfb6ce13b7ba6dfe294d96d8fe68b084e88cf48e6c6e2c7696e3fd687b84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39e45b4d18be5f6d6b84a043f66dac3ff8e08a0223affc49b335b515d6502156",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2016-12-14T03:53:42Z",
    "title_canon_sha256": "e790c32847a876b106f0c1fc411773658b0fe3f9f96444630dd4028b303325ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.04476",
    "kind": "arxiv",
    "version": 3
  }
}