Pith Number

pith:ZO7I2N6I

pith:2012:ZO7I2N6IXRAO22LT4BPGUSS45J

not attested not anchored not stored refs pending

Topology Explains Why Automobile Sunshades Fold Oddly

Curtis Feist, Ramin Naimi

arxiv:1205.4797 v1 · 2012-05-22 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZO7I2N6IXRAO22LT4BPGUSS45J}

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	2026-05-18T03:55:11.645994Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cbbe8d37c8bc40ed6973e05e6a4a5cea553baacfc7ccde62a56688eefdcf628b

Aliases

arxiv: 1205.4797 · arxiv_version: 1205.4797v1 · doi: 10.48550/arxiv.1205.4797 · pith_short_12: ZO7I2N6IXRAO · pith_short_16: ZO7I2N6IXRAO22LT · pith_short_8: ZO7I2N6I

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/ZO7I2N6IXRAO22LT4BPGUSS45J \
  | 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: cbbe8d37c8bc40ed6973e05e6a4a5cea553baacfc7ccde62a56688eefdcf628b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "291db03d81afaedcd4f210a7bd927a975fa08700154c6d9b61048fcbc0495a32",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2012-05-22T03:45:56Z",
    "title_canon_sha256": "06522e2c707f517c4578361fb3d98559f1d5a4ecb000ace053dc7402b127d488"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.4797",
    "kind": "arxiv",
    "version": 1
  }
}