Pith Number

pith:PWBMB32J

pith:2015:PWBMB32JFN7GMUWQZRIABDCQHX

not attested not anchored not stored refs pending

South Pointing Chariot: An Invitation to Differential Geometry

Stephen Sawin

arxiv:1502.07671 v1 · 2015-02-24 · math.HO · 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{PWBMB32JFN7GMUWQZRIABDCQHX}

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	2026-05-18T02:26:03.155250Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d82c0ef492b7e6652d0cc50008c503dc0e343701b6fcc7a21f4963bbb8baa7f

Aliases

arxiv: 1502.07671 · arxiv_version: 1502.07671v1 · doi: 10.48550/arxiv.1502.07671 · pith_short_12: PWBMB32JFN7G · pith_short_16: PWBMB32JFN7GMUWQ · pith_short_8: PWBMB32J

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/PWBMB32JFN7GMUWQZRIABDCQHX \
  | 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: 7d82c0ef492b7e6652d0cc50008c503dc0e343701b6fcc7a21f4963bbb8baa7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18da0c54b6346185fcc39a2e812e259c3f3726f2b3e6992b0eb59797247a9433",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2015-02-24T22:19:18Z",
    "title_canon_sha256": "b645257734cc1bf17fa890f6ca3f04e850d998b3d39b97f3f17028eba1d80de5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.07671",
    "kind": "arxiv",
    "version": 1
  }
}