Pith Number

pith:UUFXZNFV

pith:2012:UUFXZNFVH3XIXHH5V3GBVD3B7H

not attested not anchored not stored refs pending

Arrangements of Spheres and Projective Spaces

Priyavrat Deshpande

arxiv:1201.2193 v2 · 2012-01-10 · math.AT · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UUFXZNFVH3XIXHH5V3GBVD3B7H}

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	2026-05-18T02:32:00.559085Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a50b7cb4b53eee8b9cfdaecc1a8f61f9f2dee176b7e9b649a6593ea5bf994b37

Aliases

arxiv: 1201.2193 · arxiv_version: 1201.2193v2 · doi: 10.48550/arxiv.1201.2193 · pith_short_12: UUFXZNFVH3XI · pith_short_16: UUFXZNFVH3XIXHH5 · pith_short_8: UUFXZNFV

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/UUFXZNFVH3XIXHH5V3GBVD3B7H \
  | 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: a50b7cb4b53eee8b9cfdaecc1a8f61f9f2dee176b7e9b649a6593ea5bf994b37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "113bff99a571e2d70460d29bcad98ff57ed503bff5442760423e5c5e2bac1b4e",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2012-01-10T21:36:20Z",
    "title_canon_sha256": "7b4d5f6b657041f0598a8be4f0f551c8797b9eef9e43997edfaa4a34ec136a0f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.2193",
    "kind": "arxiv",
    "version": 2
  }
}